diff --git a/.github/workflows/build-multiarch.yml b/.github/workflows/build-multiarch.yml
index b26e032d..f6119e2c 100644
--- a/.github/workflows/build-multiarch.yml
+++ b/.github/workflows/build-multiarch.yml
@@ -8,8 +8,6 @@ on:
       - java11*
       - java16*
       - java17*
-      - test/*
-      - fix/*
     tags:
       - "[0-9]+.[0-9]+.[0-9]+"
       - "[0-9]+.[0-9]+.[0-9]+-java8-multiarch"
diff --git a/.github/workflows/pr.yml b/.github/workflows/pr.yml
index c619ca43..9069dbc7 100644
--- a/.github/workflows/pr.yml
+++ b/.github/workflows/pr.yml
@@ -3,13 +3,18 @@ name: Validate PR
 on:
   pull_request:
     branches: [ master ]
+    types: [assigned, opened, synchronize, labeled]
+    paths-ignore:
+      - "*.md"
+      - "docs/**"
+      - "examples/**"
 
 env:
   IMAGE_TO_TEST: itzg/minecraft-server:test-${{ github.repository_owner }}-${{ github.run_id }}
 
 jobs:
   test:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
 
     steps:
       - uses: actions/checkout@v2.4.0
@@ -25,8 +30,34 @@ jobs:
           tags: ${{ env.IMAGE_TO_TEST }}
           load: true
           cache-from: type=gha
-          cache-to: type=gha,mode=max
 
       - name: Run tests
         run: |
           tests/test.sh
+
+      - name: Gather Docker metadata
+        if: contains(github.event.pull_request.labels.*.name, 'ci/push-image')
+        id: meta
+        uses: docker/metadata-action@v3
+        with:
+          images: |
+            itzg/minecraft-server
+
+      - name: Login to DockerHub
+        if: contains(github.event.pull_request.labels.*.name, 'ci/push-image')
+        uses: docker/login-action@v1
+        with:
+          username: ${{ secrets.DOCKER_USER }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+
+      - name: Push
+        if: contains(github.event.pull_request.labels.*.name, 'ci/push-image')
+        uses: docker/build-push-action@v2.7.0
+        with:
+          context: .
+          platforms: linux/amd64,linux/arm/v7,linux/arm64
+          tags: ${{ steps.meta.outputs.tags }}
+          pull: true
+          push: true
+          cache-from: type=gha
+          labels: ${{ steps.meta.outputs.labels }}
diff --git a/.gitignore b/.gitignore
index 574e0d91..d7b092b9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,6 @@
+.vscode
 /data/
 /.idea/
 *.iml
-/gh-md-toc
\ No newline at end of file
+*.zip
+/gh-md-toc
diff --git a/Dockerfile b/Dockerfile
index 2f41656b..c59ad182 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -5,23 +5,23 @@ LABEL org.opencontainers.image.authors="Geoff Bourne <itzgeoff@gmail.com>"
 RUN apt-get update \
   && DEBIAN_FRONTEND=noninteractive \
   apt-get install -y \
-    imagemagick \
-    gosu \
-    sudo \
-    net-tools \
-    iputils-ping \
-    curl wget \
-    git \
-    jq \
-    dos2unix \
-    mysql-client \
-    tzdata \
-    rsync \
-    nano \
-    unzip \
-    knockd \
-    ttf-dejavu \
-    && apt-get clean
+  imagemagick \
+  gosu \
+  sudo \
+  net-tools \
+  iputils-ping \
+  curl \
+  git \
+  jq \
+  dos2unix \
+  mysql-client \
+  tzdata \
+  rsync \
+  nano \
+  unzip \
+  knockd \
+  ttf-dejavu \
+  && apt-get clean
 
 RUN addgroup --gid 1000 minecraft \
   && adduser --system --shell /bin/false --uid 1000 --ingroup minecraft --home /data minecraft
@@ -45,26 +45,26 @@ RUN easy-add --var os=${TARGETOS} --var arch=${TARGETARCH}${TARGETVARIANT} \
   --from https://github.com/itzg/{{.app}}/releases/download/{{.version}}/{{.app}}_{{.version}}_{{.os}}_{{.arch}}.tar.gz
 
 RUN easy-add --var os=${TARGETOS} --var arch=${TARGETARCH}${TARGETVARIANT} \
- --var version=1.5.1 --var app=rcon-cli --file {{.app}} \
- --from https://github.com/itzg/{{.app}}/releases/download/{{.version}}/{{.app}}_{{.version}}_{{.os}}_{{.arch}}.tar.gz
+  --var version=1.5.1 --var app=rcon-cli --file {{.app}} \
+  --from https://github.com/itzg/{{.app}}/releases/download/{{.version}}/{{.app}}_{{.version}}_{{.os}}_{{.arch}}.tar.gz
 
 RUN easy-add --var os=${TARGETOS} --var arch=${TARGETARCH}${TARGETVARIANT} \
- --var version=0.10.3 --var app=mc-monitor --file {{.app}} \
- --from https://github.com/itzg/{{.app}}/releases/download/{{.version}}/{{.app}}_{{.version}}_{{.os}}_{{.arch}}.tar.gz
+  --var version=0.10.3 --var app=mc-monitor --file {{.app}} \
+  --from https://github.com/itzg/{{.app}}/releases/download/{{.version}}/{{.app}}_{{.version}}_{{.os}}_{{.arch}}.tar.gz
 
 RUN easy-add --var os=${TARGETOS} --var arch=${TARGETARCH}${TARGETVARIANT} \
- --var version=1.8.0 --var app=mc-server-runner --file {{.app}} \
- --from https://github.com/itzg/{{.app}}/releases/download/{{.version}}/{{.app}}_{{.version}}_{{.os}}_{{.arch}}.tar.gz
+  --var version=1.8.0 --var app=mc-server-runner --file {{.app}} \
+  --from https://github.com/itzg/{{.app}}/releases/download/{{.version}}/{{.app}}_{{.version}}_{{.os}}_{{.arch}}.tar.gz
 
 RUN easy-add --var os=${TARGETOS} --var arch=${TARGETARCH}${TARGETVARIANT} \
- --var version=0.1.1 --var app=maven-metadata-release --file {{.app}} \
- --from https://github.com/itzg/{{.app}}/releases/download/{{.version}}/{{.app}}_{{.version}}_{{.os}}_{{.arch}}.tar.gz
+  --var version=0.1.1 --var app=maven-metadata-release --file {{.app}} \
+  --from https://github.com/itzg/{{.app}}/releases/download/{{.version}}/{{.app}}_{{.version}}_{{.os}}_{{.arch}}.tar.gz
 
 ARG MC_HELPER_VERSION=1.11.0
 ARG MC_HELPER_BASE_URL=https://github.com/itzg/mc-image-helper/releases/download/v${MC_HELPER_VERSION}
 RUN curl -fsSL ${MC_HELPER_BASE_URL}/mc-image-helper-${MC_HELPER_VERSION}.tgz \
-    | tar -C /usr/share -zxf - \
-    && ln -s /usr/share/mc-image-helper-${MC_HELPER_VERSION}/bin/mc-image-helper /usr/bin
+  | tar -C /usr/share -zxf - \
+  && ln -s /usr/share/mc-image-helper-${MC_HELPER_VERSION}/bin/mc-image-helper /usr/bin
 
 VOLUME ["/data"]
 WORKDIR /data
diff --git a/README.md b/README.md
index 2d2465ff..78056ac1 100644
--- a/README.md
+++ b/README.md
@@ -24,6 +24,7 @@ By default, the container will download the latest version of the "vanilla" [Min
 **TABLE OF CONTENTS**
 
 <!--ts-->
+   * [Mitigated Log4jShell Vulnerability](#mitigated-log4jshell-vulnerability)
    * [Looking for a Bedrock Dedicated Server](#looking-for-a-bedrock-dedicated-server)
    * [Interacting with the server](#interacting-with-the-server)
    * [Data Directory](#data-directory)
@@ -45,6 +46,7 @@ By default, the container will download the latest version of the "vanilla" [Min
       * [Running a Bukkit/Spigot server](#running-a-bukkitspigot-server)
       * [Running a Paper server](#running-a-paper-server)
       * [Running an Airplane server](#running-an-airplane-server)
+      * [Running a Pufferfish server](#running-a-pufferfish-server)
       * [Running a Purpur server](#running-a-purpur-server)
       * [Running a Magma server](#running-a-magma-server)
       * [Running a Mohist server](#running-a-mohist-server)
@@ -74,6 +76,7 @@ By default, the container will download the latest version of the "vanilla" [Min
       * [Cloning world from a container path](#cloning-world-from-a-container-path)
       * [Overwrite world on start](#overwrite-world-on-start)
       * [Datapacks](#datapacks)
+      * [VanillaTweaks](#vanillatweaks)
    * [Server configuration](#server-configuration)
       * [Message of the Day](#message-of-the-day)
       * [Difficulty](#difficulty)
@@ -136,10 +139,14 @@ By default, the container will download the latest version of the "vanilla" [Min
    * [Running on RaspberryPi](#running-on-raspberrypi)
    * [Contributing](#contributing)
 
-<!-- Added by: runner, at: Wed Dec 22 13:01:43 UTC 2021 -->
+<!-- Added by: runner, at: Thu Jan  6 12:50:03 UTC 2022 -->
 
 <!--te-->
 
+## Mitigated Log4jShell Vulnerability
+
+**Please ensure you have pulled the latest image** since [all official mitigations](https://www.minecraft.net/en-us/article/important-message--security-vulnerability-java-edition) are automatically applied by the container startup process.
+
 ## Looking for a Bedrock Dedicated Server
 
 For Minecraft clients running on consoles, mobile, or native Windows, you'll need to
@@ -285,6 +292,7 @@ When using the image `itzg:/minecraft-server` without a tag, the `latest` image
 | java11-openj9  | 11           | Debian | OpenJ9   | amd64             |
 | java16-openj9  | 16           | Debian | OpenJ9   | amd64             |
 | java17         | 17           | Ubuntu | Hotspot  | amd64,arm64,armv7 |
+| java17-openj9  | 17           | Debian | OpenJ9   | amd64             |
 
 For example, to use Java version 8 on any supported architecture:
 
@@ -479,6 +487,18 @@ Extra variables:
 - `FORCE_REDOWNLOAD=false` : set to true to force the located server jar to be re-downloaded
 - `USE_FLARE_FLAGS=false` : set to true to add appropriate flags for the [Flare](https://blog.airplane.gg/flare) profiler
 
+### Running a Pufferfish server
+
+A [Pufferfish](https://github.com/pufferfish-gg/Pufferfish) server, which is "a highly optimized Paper fork designed for large servers requiring both maximum performance, stability, and "enterprise" features."
+
+    -e TYPE=PUFFERFISH
+
+> NOTE: The `VERSION` variable is used to select a Pufferfish branch to download from. The available options are "LATEST" and "1.18"
+
+Extra variables:
+- `PUFFERFISH_BUILD=lastSuccessfulBuild` : set a specific Pufferfish build to use
+- `FORCE_REDOWNLOAD=false` : set to true to force the located server jar to be re-downloaded
+
 ### Running a Purpur server
 
 A [Purpur](https://purpur.pl3x.net/) server, which is "drop-in replacement for Paper servers designed for configurability, new fun and exciting gameplay features, and performance built on top of Airplane."
@@ -804,6 +824,47 @@ Datapacks can be installed in a similar manner to mods/plugins. There are many e
 * `REMOVE_OLD_DATAPACKS_EXCLUDE`
 Datapacks will be placed in `/data/$LEVEL/datapacks`
 
+### VanillaTweaks
+
+VanillaTweaks datapacks can be installed with a share code from the website UI **OR** a json file to specify packs to download and install.
+
+Accepted Parameters:
+
+- `VANILLATWEAKS_FILE`
+- `VANILLATWEAKS_SHARECODE`
+- `REMOVE_OLD_VANILLATWEAKS`
+- `REMOVE_OLD_VANILLATWEAKS_DEPTH`
+- `REMOVE_OLD_VANILLATWEAKS_INCLUDE`
+- `REMOVE_OLD_VANILLATWEAKS_EXCLUDE`
+
+Example of expected Vanillatweaks sharecode: 
+
+```yaml
+VANILLATWEAKS_SHARECODE: MGr52E
+```
+
+Example of expected Vanillatweaks file format:
+
+```json
+{
+  "version": "1.18",
+  "packs": {
+    "survival": [
+      "graves",
+      "multiplayer sleep",
+      "afk display",
+      "armor statues",
+      "unlock all recipes",
+      "fast leaf decay",
+      "coordinates hud"
+    ],
+    "items": ["armored elytra"]
+  }
+}
+```
+
+Datapacks will be placed in `/data/$LEVEL/datapacks`
+
 ## Server configuration
 
 By default, the server configuration will be created and set based on the following environment variables, but only the first time the server is started. If the `server.properties` file already exists, the values in them will not be changed.
@@ -1400,10 +1461,6 @@ To enable remote JMX, such as for profiling with VisualVM or JMC, add the enviro
 
 When `MEMORY` is greater than or equal to 12G, then the Aikar flags will be adjusted according to the article.
 
-Large page support can also be enabled by adding
-
-    -e USE_LARGE_PAGES=true
-
 ### HTTP Proxy
 
 You may configure the use of an HTTP/HTTPS proxy by passing the proxy's URL via the `PROXY`
@@ -1459,6 +1516,8 @@ Enable the Autopause functionality by setting:
 
 Autopause is not compatible with `EXEC_DIRECTLY=true` and the two cannot be set together.
 
+> When configuring kubernetes readiness/liveness health checks with auto-pause enabled, be sure to reference the `mc-health` wrapper script rather than `mc-status` directly.
+
 The following environment variables define the behaviour of auto-pausing:
 * `AUTOPAUSE_TIMEOUT_EST`, default `3600` (seconds)
   describes the time between the last client disconnect and the pausing of the process (read as timeout established)
diff --git a/examples/docker-compose-generic-pack.yml b/examples/docker-compose-generic-pack.yml
index 314a8083..dfb2d152 100644
--- a/examples/docker-compose-generic-pack.yml
+++ b/examples/docker-compose-generic-pack.yml
@@ -13,6 +13,7 @@ services:
       VERSION: ${VERSION:-1.17.1}
       FORGEVERSION: ${FORGEVERSION:-37.0.90}
       GENERIC_PACK: /modpacks/${MODPACK:-Server-Files-0.0.21.zip}
+      REMOVE_OLD_MODS: "${REMOVE_OLD_MODS:-false}"
     ports:
       - "25565:25565"
 
diff --git a/examples/vanilla-tweaks/docker-compose.yml b/examples/vanilla-tweaks/docker-compose.yml
new file mode 100644
index 00000000..6adf5dce
--- /dev/null
+++ b/examples/vanilla-tweaks/docker-compose.yml
@@ -0,0 +1,27 @@
+version: "3.3"
+
+services:
+  vanillatweaks_file:
+    restart: "no"
+    image: itzg/minecraft-server
+    ports:
+      - "25565:25565/tcp"
+    environment:
+      EULA: "TRUE"
+      VERSION: ${MINECRAFT_VERSION:-LATEST}
+      VANILLATWEAKS_FILE: /config/vanillatweaks-datapacks.json
+      REMOVE_OLD_VANILLATWEAKS: "TRUE"
+    volumes:
+      - data:/data
+      - ./vanillatweaks-datapacks.json:/config/vanillatweaks-datapacks.json:ro
+  vanillatweaks_sharecode:
+    # port is set to 25566 to not conflict with vanillatweaks_file example
+    ports:
+      - "25566:25565/tcp"
+    restart: "no"
+    image: itzg/minecraft-server
+    environment:
+      EULA: "TRUE"
+      VERSION: ${MINECRAFT_VERSION:-LATEST}
+      VANILLATWEAKS_SHARECODE: MGr52E
+      REMOVE_OLD_VANILLATWEAKS: "TRUE"
diff --git a/examples/vanilla-tweaks/vanillatweaks-datapacks.json b/examples/vanilla-tweaks/vanillatweaks-datapacks.json
new file mode 100644
index 00000000..aa19970d
--- /dev/null
+++ b/examples/vanilla-tweaks/vanillatweaks-datapacks.json
@@ -0,0 +1,15 @@
+{
+    "version": "1.18",
+    "packs": {
+        "survival": [
+            "graves",
+            "multiplayer sleep",
+            "afk display",
+            "armor statues",
+            "unlock all recipes",
+            "fast leaf decay",
+            "coordinates hud"
+        ],
+        "items": ["armored elytra"]
+    }
+}
diff --git a/scripts/start-configuration b/scripts/start-configuration
index 13203302..204260a7 100755
--- a/scripts/start-configuration
+++ b/scripts/start-configuration
@@ -171,6 +171,10 @@ case "${TYPE^^}" in
     exec ${SCRIPTS:-/}start-deployAirplane "$@"
   ;;
 
+  PUFFERFISH)
+    exec ${SCRIPTS:-/}start-deployPufferfish "$@"
+  ;;
+
   CANYON)
     exec ${SCRIPTS:-/}start-deployCanyon "$@"
   ;;
@@ -187,7 +191,7 @@ case "${TYPE^^}" in
       log "Invalid type: '$TYPE'"
       log "Must be: VANILLA, FORGE, BUKKIT, SPIGOT, PAPER, FTBA (multiarch-only),"
       log "         CURSEFORGE, SPONGEVANILLA, PURPUR, CUSTOM,"
-      log "         MAGMA, MOHIST, CATSERVER, AIRPLANE, CANYON, LIMBO, CRUCIBLE"
+      log "         MAGMA, MOHIST, CATSERVER, AIRPLANE, PUFFERFISH, CANYON, LIMBO, CRUCIBLE"
       exit 1
   ;;
 
diff --git a/scripts/start-deployAirplane b/scripts/start-deployAirplane
index 05e33202..601aeb67 100755
--- a/scripts/start-deployAirplane
+++ b/scripts/start-deployAirplane
@@ -14,7 +14,7 @@ fi
 : ${AIRPLANE_BUILD:=lastSuccessfulBuild}
 : ${AIRPLANE_TYPE:=airplane}
 
-if  [ "${VERSION}" = "LATEST" ] || [ "${VERSION}" = "1.17" ]; then
+if [ "${VERSION}" = "LATEST" ] || [ "${VERSION}" = "1.17" ]; then
   AIRPLANE_BRANCH="1.17"
 fi
 
@@ -36,8 +36,7 @@ done
 if [ ! -f "$SERVER" ] || isTrue "${FORCE_REDOWNLOAD:-false}"; then
     downloadUrl="https://ci.tivy.ca/job/Airplane-${AIRPLANE_BRANCH}/${AIRPLANE_BUILD}/artifact/launcher-${AIRPLANE_TYPE}.jar"
     log "Downloading Airplane from $downloadUrl ..."
-    curl -fsSL -o "$SERVER" "$downloadUrl"
-    if [ ! -f "$SERVER" ]; then
+    if ! get -o "$SERVER" "$downloadUrl"; then
       log "ERROR: failed to download from $downloadUrl (status=$?)"
       exit 3
     fi
diff --git a/scripts/start-deployCF b/scripts/start-deployCF
index c00c1dcf..ff2a72e8 100755
--- a/scripts/start-deployCF
+++ b/scripts/start-deployCF
@@ -35,11 +35,37 @@ FTB_SERVER_MOD=${FTB_SERVER_MOD:-$CF_SERVER_MOD}
 log "Looking for Feed-The-Beast / CurseForge server modpack."
 requireVar FTB_SERVER_MOD
 
-if ! isTrue "${USE_MODPACK_START_SCRIPT:-true}"; then
-  if ! [ -f "${FTB_SERVER_MOD}" ]; then
-    log "ERROR unable to find requested modpack file ${FTB_SERVER_MOD}"
-    exit 2
+downloadModpack() {
+  srv_modpack=${FTB_SERVER_MOD}
+  if isURL "${srv_modpack}"; then
+    log "Downloading modpack from ${srv_modpack}..."
+    if ! srv_modpack=$(get -o /data --output-filename --skip-existing "${srv_modpack}"); then
+      log "ERROR: failed to download modpack"
+      exit 1
+    fi
   fi
+  if [[ "${srv_modpack:0:5}" == "data/" ]]; then
+      # Prepend with "/"
+      srv_modpack="/${srv_modpack}"
+  fi
+  if [[ ! "${srv_modpack:0:1}" == "/" ]]; then
+      # If not an absolute path, assume file is in "/data"
+      srv_modpack=/data/${srv_modpack}
+  fi
+  if [[ ! -f "${srv_modpack}" ]]; then
+      log "FTB server modpack ${srv_modpack} not found."
+      exit 2
+  fi
+  if [[ ! "${srv_modpack: -4}" == ".zip" ]]; then
+      log "FTB server modpack ${srv_modpack} is not a zip archive."
+      log "Please set FTB_SERVER_MOD to a file with a .zip extension."
+      exit 2
+  fi
+  FTB_SERVER_MOD=${srv_modpack}
+}
+
+if ! isTrue "${USE_MODPACK_START_SCRIPT:-true}"; then
+  downloadModpack
 
   needsInstall=true
   installMarker=/data/.curseforge-installed
@@ -47,7 +73,7 @@ if ! isTrue "${USE_MODPACK_START_SCRIPT:-true}"; then
     if [ "$(cat $installMarker)" != "${FTB_SERVER_MOD}" ]; then
       log "Upgrading modpack"
 
-      serverJar=$(find "${FTB_BASE_DIR}" -not -name "forge*installer.jar" -name "forge*.jar")
+      serverJar=$(find "${FTB_BASE_DIR}" -type f \( -path "*/libraries/*" -o -path "*/mods/*" \) -prune -o -name "forge*.jar" -not -name "forge*installer.jar" -print)
       if [[ "${serverJar}" ]]; then
         rm -rf "$(dirname "${serverJar}")"/{mods,*.jar,libraries,resources,scripts,config}
       fi
@@ -132,32 +158,9 @@ fi
 # also check for the start script rather than just the folder
 # this allows saving just the world separate from the rest of the data directory
 if [[ $startScriptCount = 0 ]]; then
+  downloadModpack
   srv_modpack=${FTB_SERVER_MOD}
-  if isURL "${srv_modpack}"; then
-    log "Downloading modpack from ${srv_modpack}..."
-    if ! srv_modpack=$(get -o /data --output-filename --skip-existing "${srv_modpack}"); then
-      log "ERROR: failed to download modpack"
-      exit 1
-    fi
-  fi
-  if [[ "${srv_modpack:0:5}" == "data/" ]]; then
-      # Prepend with "/"
-      srv_modpack="/${srv_modpack}"
-  fi
-  if [[ ! "${srv_modpack:0:1}" == "/" ]]; then
-      # If not an absolute path, assume file is in "/data"
-      srv_modpack=/data/${srv_modpack}
-  fi
-  if [[ ! -f "${srv_modpack}" ]]; then
-      log "FTB server modpack ${srv_modpack} not found."
-      exit 2
-  fi
-  if [[ ! "${srv_modpack: -4}" == ".zip" ]]; then
-      log "FTB server modpack ${srv_modpack} is not a zip archive."
-      log "Please set FTB_SERVER_MOD to a file with a .zip extension."
-      exit 2
-  fi
-
+  
   log "Unpacking FTB server modpack ${srv_modpack} ..."
   mkdir -p "${FTB_BASE_DIR}"
   unzip -o "${srv_modpack}" -d "${FTB_BASE_DIR}" | awk '{printf "."} END {print ""}'
diff --git a/scripts/start-deployPufferfish b/scripts/start-deployPufferfish
new file mode 100755
index 00000000..02666114
--- /dev/null
+++ b/scripts/start-deployPufferfish
@@ -0,0 +1,46 @@
+#!/bin/bash
+
+. ${SCRIPTS:-/}start-utils
+set -euo pipefail
+isDebugging && set -x
+
+IFS=$'\n\t'
+
+if [ "${VERSION}" != "LATEST" ] && [ "${VERSION}" != "1.18" ] ; then
+  log "ERROR: Pufferfish server type only supports VERSION=LATEST, VERSION=1.18. Note that these are branches, not #.#.# versions."
+  exit 1
+fi
+
+: ${PUFFERFISH_BUILD:=lastSuccessfulBuild}
+
+if  [ "${VERSION}" = "LATEST" ] || [ "${VERSION}" = "1.18" ]; then
+  PUFFERFISH_BRANCH="1.18"
+  PUFFERFISH_VERSION="1.18.1-R0.1"
+fi
+
+log "Using Pufferfish-${PUFFERFISH_BRANCH} branch"
+
+export SERVER=pufferfish-${PUFFERFISH_BRANCH}-${PUFFERFISH_BUILD}.jar
+
+log "Removing old Pufferfish versions ..."
+shopt -s nullglob
+for f in pufferfish-*.jar; do
+  [[ $f != $SERVER ]] && rm $f
+done
+
+if [ ! -f "$SERVER" ] || isTrue "${FORCE_REDOWNLOAD:-false}"; then
+    artifact="build/libs/pufferfish-paperclip-${PUFFERFISH_VERSION}-SNAPSHOT-reobf.jar"
+    downloadUrl="https://ci.pufferfish.host/job/Pufferfish-${PUFFERFISH_BRANCH}/${PUFFERFISH_BUILD}/artifact/${artifact}"
+    log "Downloading Pufferfish from $downloadUrl ..."
+    if ! get -o "$SERVER" "$downloadUrl"; then
+      log "ERROR: failed to download from $downloadUrl (status=$?)"
+      exit 3
+    fi
+fi
+
+# Normalize on Spigot for later operations
+export TYPE=SPIGOT
+export FAMILY=SPIGOT
+export SKIP_LOG4J_CONFIG=true
+
+exec ${SCRIPTS:-/}start-spiget "$@"
diff --git a/scripts/start-deployPurpur b/scripts/start-deployPurpur
index e8b38424..de3234b3 100755
--- a/scripts/start-deployPurpur
+++ b/scripts/start-deployPurpur
@@ -2,7 +2,8 @@
 set -euo pipefail
 IFS=$'\n\t'
 
-. ${SCRIPTS:-/}start-utils
+# shellcheck source=start-utils
+. "${SCRIPTS:-/}start-utils"
 isDebugging && set -x
 
 : ${VANILLA_VERSION:?}
@@ -10,12 +11,10 @@ isDebugging && set -x
 : ${FORCE_REDOWNLOAD:=false}
 
 if [[ ${PURPUR_BUILD} == LATEST ]]; then
-  PURPUR_BUILD=$(curl -fsSL "https://api.purpurmc.org/v2/purpur/${VANILLA_VERSION}" |
-    jq -r '.builds.latest' || echo "")
-  if [[ -z ${PURPUR_BUILD} ]]; then
+  if ! PURPUR_BUILD=$(get --json-path=".builds.latest" "https://api.purpurmc.org/v2/purpur/${VANILLA_VERSION}"); then
     log "ERROR: Failed to locate a Purpur build for ${VANILLA_VERSION}."
     log "       Please check if a download is available at https://purpur.pl3x.net/downloads/"
-    exit 3
+    exit 1
   fi
 fi
 
@@ -24,7 +23,7 @@ export SERVER="purpur-${VANILLA_VERSION}-${PURPUR_BUILD}.jar"
 if [ ! -f "$SERVER" ] || isTrue "$FORCE_REDOWNLOAD"; then
     downloadUrl="https://api.purpurmc.org/v2/purpur/${VANILLA_VERSION}/${PURPUR_BUILD}/download"
     log "Downloading Purpur from $downloadUrl ..."
-    if ! curl -fsSL -o "$SERVER" "$downloadUrl"; then
+    if ! get -o "$SERVER" "$downloadUrl"; then
       log "ERROR: failed to download from $downloadUrl (status=$?)"
       exit 3
     fi
@@ -35,4 +34,4 @@ export TYPE=SPIGOT
 export FAMILY=SPIGOT
 export SKIP_LOG4J_CONFIG=true
 
-exec ${SCRIPTS:-/}start-spiget "$@"
+exec "${SCRIPTS:-/}start-spiget" "$@"
diff --git a/scripts/start-finalExec b/scripts/start-finalExec
index 8e684d97..f0d6b5fb 100755
--- a/scripts/start-finalExec
+++ b/scripts/start-finalExec
@@ -236,12 +236,6 @@ if isTrue "${USE_AIKAR_FLAGS}"; then
   "
 fi
 
-if isTrue "${USE_LARGE_PAGES}"; then
-  JVM_XX_OPTS="${JVM_XX_OPTS}
-  -XX:+UseLargePagesInMetaspace
-  "
-fi
-
 if isTrue "${USE_FLARE_FLAGS}"; then
   JVM_XX_OPTS="${JVM_XX_OPTS}
   -XX:+UnlockDiagnosticVMOptions
diff --git a/scripts/start-setupModpack b/scripts/start-setupModpack
index 02036b46..37bbaf78 100755
--- a/scripts/start-setupModpack
+++ b/scripts/start-setupModpack
@@ -6,6 +6,7 @@ set -e -o pipefail
 : "${MODS_FILE:=}"
 : "${REMOVE_OLD_MODS_DEPTH:=1} "
 : "${REMOVE_OLD_MODS_INCLUDE:=*.jar}"
+sum_file=/data/.generic_pack.sum
 
 # shellcheck source=start-utils
 . "${SCRIPTS:-/}start-utils"
@@ -18,6 +19,7 @@ CURSE_URL_BASE=${CURSE_URL_BASE:-https://minecraft.curseforge.com/projects}
 if isTrue "${REMOVE_OLD_MODS}" && [ -z "${MODS_FILE}" ]; then
   removeOldMods /data/mods
   removeOldMods /data/plugins
+  rm -f "$sum_file"
 fi
 
 # If packwiz url passed, bootstrap packwiz and update mods before other modpack processing
@@ -204,7 +206,6 @@ if [[ "${GENERIC_PACKS}" ]]; then
     fi
   done
 
-  sum_file=/data/.generic_pack.sum
   isDebugging && [ -f "$sum_file}" ] && cat "$sum_file"
   if ! sha256sum -c "${sum_file}" --status 2> /dev/null; then
     base_dir=/tmp/generic_pack_base
diff --git a/scripts/start-setupVanillaTweaks b/scripts/start-setupVanillaTweaks
new file mode 100644
index 00000000..4da67423
--- /dev/null
+++ b/scripts/start-setupVanillaTweaks
@@ -0,0 +1,84 @@
+#!/bin/bash
+
+set -e -o pipefail
+
+: "${REMOVE_OLD_VANILLATWEAKS:=false}"
+: "${VANILLATWEAKS_FILE:=}"
+: "${VANILLATWEAKS_SHARECODE:=}"
+: "${REMOVE_OLD_VANILLATWEAKS_DEPTH:=1} "
+: "${REMOVE_OLD_VANILLATWEAKS_INCLUDE:=*.zip}"
+
+# shellcheck source=start-utils
+. "${SCRIPTS:-/}start-utils"
+isDebugging && set -x
+
+out_dir=/data/${LEVEL:-world}/datapacks
+
+# Remove old VANILLATWEAKS
+if isTrue "${REMOVE_OLD_VANILLATWEAKS}" && [ -z "${VANILLATWEAKS_FILE}" ]; then
+    if [ -d "$out_dir" ]; then
+    find "$out_dir" -mindepth 1 -maxdepth ${REMOVE_OLD_VANILLATWEAKS_DEPTH:-16} -wholename "${REMOVE_OLD_VANILLATWEAKS_INCLUDE:-*}" -not -wholename "${REMOVE_OLD_VANILLATWEAKS_EXCLUDE:-}" -delete
+  fi
+fi
+
+# Example: VANILLATWEAKS_SHARECODE=MGr52E
+# Code generated from the UI website, typically a alphanumeric 6 digit code.
+if [[ "$VANILLATWEAKS_SHARECODE" ]]; then
+  VANILLATWEAKS_FILE=/tmp/vanillatweaksfile.json
+  SHARECODE_LOOKUP_URL="https://vanillatweaks.net/assets/server/sharecode.php?code=${VANILLATWEAKS_SHARECODE}"
+  curl -f $SHARECODE_LOOKUP_URL -o $VANILLATWEAKS_FILE
+  if [ ! -f "$VANILLATWEAKS_FILE" ]; then
+    log "ERROR: Unable to use share code provided to retreive vanillatweaks file"
+    exit 2
+  fi
+fi
+
+# Use vanillatweaks file to specify VT and datapacks
+if [[ "$VANILLATWEAKS_FILE" ]]; then
+  if [ ! -f "$VANILLATWEAKS_FILE" ]; then
+    log "ERROR: given VANILLATWEAKS_FILE file does not exist"
+    exit 2
+  fi
+
+  PACKS=$(jq -jc '.packs' $VANILLATWEAKS_FILE)
+  if [ ! "$PACKS" ]; then
+    log "ERROR: unable to retrieve packs from $VANILLATWEAKS_FILE"
+    exit 2
+  fi
+
+  VT_VERSION=$(jq -jc '.version' $VANILLATWEAKS_FILE)
+  if [ ! "$VT_VERSION" ]; then
+    log "ERROR: unable to retrieve version from $VANILLATWEAKS_FILE"
+    exit 2
+  fi
+fi
+
+# Download and unzip packs
+if [[ "$PACKS" ]] && [[ "$VT_VERSION" ]]; then
+  VT_ZIPDATA_URL=https://vanillatweaks.net/assets/server/zipdatapacks.php
+  DOWNLOAD_URL=$(curl -X POST -F "packs=${PACKS}" -F "version=${VT_VERSION}" $VT_ZIPDATA_URL | jq -r '.link')
+  if [ ! "$DOWNLOAD_URL" ]; then
+    log "ERROR: unable to retrieve DOWNLOAD_URL from vanillatweaks.net!"
+    exit 2
+  fi
+
+  TEMPZIP=/tmp/vanillatweaks.zip
+  if ! get -o $TEMPZIP "https://vanillatweaks.net${DOWNLOAD_URL}"; then 
+    log "ERROR: failed to download from ${DOWNLOAD_URL}"
+    exit 2
+  fi
+
+  mkdir -p "$out_dir"
+  if ! unzip -o -d "$out_dir" $TEMPZIP; then
+    log "ERROR: failed to unzip the ${PACKS} from ${$TEMPZIP}"
+  fi
+
+  # clean up files time!
+  rm -f $TEMPZIP
+  # cleans up temp vanilla tweaks file download to get stored packs
+  if [[ "$VANILLATWEAKS_SHARECODE" ]]; then
+    rm -f $VANILLATWEAKS_FILE
+  fi
+fi
+
+exec "${SCRIPTS:-/}start-setupDatapack" "$@"
diff --git a/scripts/start-setupWorld b/scripts/start-setupWorld
index 3484b46d..c4dad94f 100755
--- a/scripts/start-setupWorld
+++ b/scripts/start-setupWorld
@@ -69,4 +69,4 @@ if [[ "$WORLD" ]] && ( isTrue "${FORCE_WORLD_COPY}" || [ ! -d "$worldDest" ] );
   fi
 fi
 
-exec "${SCRIPTS:-/}start-setupDatapack" "$@"
+exec "${SCRIPTS:-/}start-setupVanillaTweaks" "$@"
diff --git a/tests/docker-compose.yml b/tests/docker-compose.yml
index f3a0bb0a..61c6f289 100644
--- a/tests/docker-compose.yml
+++ b/tests/docker-compose.yml
@@ -1,4 +1,4 @@
-version: "3.8"
+version: "3"
 
 services:
   monitor:
diff --git a/tests/generic-packs/docker-compose.test.yml b/tests/generic-packs/docker-compose.yml
similarity index 75%
rename from tests/generic-packs/docker-compose.test.yml
rename to tests/generic-packs/docker-compose.yml
index 210c54dd..46dd8344 100644
--- a/tests/generic-packs/docker-compose.test.yml
+++ b/tests/generic-packs/docker-compose.yml
@@ -2,14 +2,13 @@ version: "3"
 
 services:
   mc:
-    image: itzg/minecraft-server
+    image: ${IMAGE_TO_TEST:-itzg/minecraft-server}
     environment:
       EULA: "true"
+      SETUP_ONLY: "TRUE"
       GENERIC_PACKS: https://github.com/itzg/mc-image-helper/releases/download/v1.9.5/mc-image-helper-1.9.5.zip,/packs/testing.zip
-      DEBUG: "true"
     volumes:
       - ./packs:/packs
       - data:/data
-
 volumes:
-  data: {}
\ No newline at end of file
+  data: {}
diff --git a/tests/test.sh b/tests/test.sh
index 9db35dec..661499be 100755
--- a/tests/test.sh
+++ b/tests/test.sh
@@ -1,22 +1,56 @@
 #!/bin/bash
 
+# go to script root directory
 cd "$(dirname "$0")" || exit 1
 
-failed=false
-
+# compose down function for reuse
 down() {
-  docker-compose down -v
+  docker-compose down -v --remove-orphans
 }
 
-docker-compose run monitor || failed=true
-echo "
-Result: failed=$failed"
+fullMinecraftUpTest(){
+  name=$1
+  failed=false
+  # run the monitor to validate the Minecraft image is healthy
+  docker-compose run monitor || failed=true
+  echo "${name} Result: failed=$failed"
 
-if $failed; then
-  docker-compose logs mc
+  # docker-compose logs outputs messages from the specified container
+  if $failed; then
+    docker-compose logs mc
+    down
+    exit 2
+  fi
   down
-  exit 1
-else
-  down
-fi
+}
 
+setupOnlyMinecraftTest(){
+  folder=$1
+  failed=false
+  # run the monitor to validate the Minecraft image is healthy
+  docker-compose --log-level ERROR up --quiet-pull --exit-code-from mc 2>/dev/null || failed=true
+  echo "${folder} Result: failed=$failed"
+
+  # docker-compose logs outputs messages from the specified container
+  if $failed; then
+    docker-compose logs mc
+    down
+    cd ..
+    exit 2
+  fi
+  down
+  cd ..
+}
+
+# run tests on base docker compose and validate mc service with monitor
+fullMinecraftUpTest 'Full Vanilla Test'
+
+# go through each folder to test builds
+FOLDERS=$(ls)
+for folder in $FOLDERS; do
+    # If folder is a directory
+    if [ -d "$folder" ]; then
+      cd "$folder"
+      setupOnlyMinecraftTest $folder
+    fi
+done
diff --git a/tests/vanillatweaks_file/docker-compose.yml b/tests/vanillatweaks_file/docker-compose.yml
new file mode 100644
index 00000000..b33292ee
--- /dev/null
+++ b/tests/vanillatweaks_file/docker-compose.yml
@@ -0,0 +1,14 @@
+version: "3"
+
+services:
+  mc:
+    restart: "no"
+    image: ${IMAGE_TO_TEST:-itzg/minecraft-server}
+    environment:
+      EULA: "TRUE"
+      SETUP_ONLY: "TRUE"
+      VERSION: ${MINECRAFT_VERSION:-LATEST}
+      VANILLATWEAKS_FILE: /config/vanillatweaks-datapacks.json
+      REMOVE_OLD_VANILLATWEAKS: "TRUE"
+    volumes:
+      - ./vanillatweaks-datapacks.json:/config/vanillatweaks-datapacks.json:ro
diff --git a/tests/vanillatweaks_file/vanillatweaks-datapacks.json b/tests/vanillatweaks_file/vanillatweaks-datapacks.json
new file mode 100644
index 00000000..80604c49
--- /dev/null
+++ b/tests/vanillatweaks_file/vanillatweaks-datapacks.json
@@ -0,0 +1,17 @@
+{
+    "type": "datapacks",
+    "version": "1.18",
+    "packs": {
+        "survival": [
+            "graves",
+            "multiplayer sleep",
+            "afk display",
+            "armor statues",
+            "unlock all recipes",
+            "fast leaf decay",
+            "coordinates hud"
+        ],
+        "items": ["armored elytra"]
+    },
+    "result": "ok"
+}
diff --git a/tests/vanillatweaks_sharecode/docker-compose.yml b/tests/vanillatweaks_sharecode/docker-compose.yml
new file mode 100644
index 00000000..66eac5b5
--- /dev/null
+++ b/tests/vanillatweaks_sharecode/docker-compose.yml
@@ -0,0 +1,12 @@
+version: "3"
+
+services:
+  mc:
+    restart: "no"
+    image: ${IMAGE_TO_TEST:-itzg/minecraft-server}
+    environment:
+      EULA: "TRUE"
+      SETUP_ONLY: "TRUE"
+      VERSION: ${MINECRAFT_VERSION:-LATEST}
+      VANILLATWEAKS_SHARECODE: MGr52E
+      REMOVE_OLD_VANILLATWEAKS: "TRUE"