diff --git a/.dockerignore b/.dockerignore
index 1db22cbb..cbb305e6 100644
--- a/.dockerignore
+++ b/.dockerignore
@@ -1,5 +1,6 @@
 data
+testdata
 examples
 k8s-examples
 .idea
-.git
\ No newline at end of file
+.git
diff --git a/README.md b/README.md
index aa12728c..a9b71349 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@ latest snapshot. See the _Versions_ section below for more information.
 
 To simply use the latest stable version, run
 
-    docker run -d -p 25565:25565 --name mc itzg/minecraft-server
+    docker run -d -p 25565:25565 --name mc -e EULA=TRUE itzg/minecraft-server
 
 where the standard server port, 25565, will be exposed on your host machine.
 
@@ -35,6 +35,7 @@ With that you can easily view the logs, stop, or re-start the container:
     docker stop mc
 
     docker start mc
+*Be sure to always include `-e EULA=TRUE` in your commands, as Mojang/Microsoft requires EULA acceptance.*
 
 ## Looking for a Bedrock Dedicated Server
 
@@ -269,10 +270,20 @@ the `/path/on/host` folder contents look like:
 ├── ops.json
 ├── server.properties
 ├── whitelist.json
+├── worlds
+│   └── ... PLACE MAPS IN THEIR OWN FOLDERS HERE ...
 └── ...
 ```
 
-If you add mods while the container is running, you'll need to restart it to pick those
+Providing a presistent `/data` mount is a good idea, both to persist the game world and to allow for the manual configuration which is sometimes needed.
+
+For instance, imagine a scenario when the initial launch has completed, but you now want to change the worldmap for your server.  
+
+Assuming you have a shared directory to your container, you can then (after first launch) drag and drop your premade maps or worlds into the `\worlds\` directory.  **Note:** each world should be placed in its own folder under the `\worlds\` directory.  
+
+Once your maps are in the proper path, you can then specify which map the server uses by changing the `level-name` value in `server.properties` to match the name of your map.
+
+If you add mods or make changes to `server.properties` while the container is running, you'll need to restart it to pick those
 up:
 
     docker stop mc
@@ -291,6 +302,8 @@ This works well if you want to have a common set of modules in a separate
 location, but still have multiple worlds with different server requirements
 in either persistent volumes or a downloadable archive.
 
+
+
 ### Replacing variables inside configs
 
 Sometimes you have mods or plugins that require configuration information that is only available at runtime.
@@ -390,7 +403,7 @@ secrets:
 The content of `db_password`:
 
     ug23u3bg39o-ogADSs
-
+    
 ## Running a Bukkit/Spigot server
 
 Enable Bukkit/Spigot server mode by adding a `-e TYPE=BUKKIT` or `-e TYPE=SPIGOT` to your command-line.
diff --git a/start-finalSetupModpack b/start-finalSetupModpack
index 40962733..e21340cc 100644
--- a/start-finalSetupModpack
+++ b/start-finalSetupModpack
@@ -18,42 +18,60 @@ fi
 
 # If supplied with a URL for a modpack (simple zip of jars), download it and unpack
 if [[ "$MODPACK" ]]; then
-EFFECTIVE_MODPACK_URL=$(curl -Ls -o /dev/null -w %{url_effective} $MODPACK)
-case "X$EFFECTIVE_MODPACK_URL" in
-  X[Hh][Tt][Tt][Pp]*.zip)
+  if isURL "${MODPACK}"; then
+    if [[ "${MODPACK}" == *.zip ]]; then
+      downloadUrl="${MODPACK}"
+    else
+      downloadUrl=$(curl -Ls -o /dev/null -w %{url_effective} $MODPACK)
+      if ! [[ $downloadUrl == *.zip ]]; then
+        log "ERROR Invalid URL given for MODPACK: $downloadUrl resolved from $MODPACK"
+        log "      Must be HTTP or HTTPS and a ZIP file"
+        exit 1
+      fi
+    fi
+
     log "Downloading mod/plugin pack via HTTP"
-    log "  from $EFFECTIVE_MODPACK_URL ..."
-    if ! curl -sSL -o /tmp/modpack.zip "$EFFECTIVE_MODPACK_URL"; then
-      log "ERROR: failed to download from $EFFECTIVE_MODPACK_URL"
+    log "  from $downloadUrl ..."
+    if ! curl -sSL -o /tmp/modpack.zip "$downloadUrl"; then
+      log "ERROR: failed to download from $downloadUrl"
       exit 2
     fi
 
     if [ "$TYPE" = "SPIGOT" ]; then
       mkdir -p /data/plugins
       if ! unzip -o -d /data/plugins /tmp/modpack.zip; then
-        log "ERROR: failed to unzip the modpack from $EFFECTIVE_MODPACK_URL"
+        log "ERROR: failed to unzip the modpack from $downloadUrl"
       fi
     else
       mkdir -p /data/mods
       if ! unzip -o -d /data/mods /tmp/modpack.zip; then
-        log "ERROR: failed to unzip the modpack from $EFFECTIVE_MODPACK_URL"
+        log "ERROR: failed to unzip the modpack from $downloadUrl"
       fi
     fi
     rm -f /tmp/modpack.zip
-    ;;
-  *)
-    log "Invalid URL given for modpack: Must be HTTP or HTTPS and a ZIP file"
-    ;;
-esac
+
+  else
+    log "ERROR Invalid URL given for MODPACK: $MODPACK"
+    exit 1
+  fi
 fi
 
 # If supplied with a URL for a plugin download it.
 if [[ "$MODS" ]]; then
-for i in ${MODS//,/ }
-do
-  EFFECTIVE_MOD_URL=$(curl -Ls -o /dev/null -w %{url_effective} $i)
-  case "X$EFFECTIVE_MOD_URL" in
-    X[Hh][Tt][Tt][Pp]*.jar)
+  for i in ${MODS//,/ }
+  do
+    if isURL $i; then
+      if [[ $i == *.jar ]]; then
+        EFFECTIVE_MOD_URL=$i
+      else
+        EFFECTIVE_MOD_URL=$(curl -Ls -o /dev/null -w %{url_effective} $i)
+        if ! [[ $EFFECTIVE_MOD_URL == *.jar ]]; then
+          log "ERROR Invalid URL given in MODS: $EFFECTIVE_MOD_URL resolved from $i"
+          log "      Must be HTTP or HTTPS and a JAR file"
+          exit 1
+        fi
+      fi
+
       log "Downloading mod/plugin via HTTP"
       log "  from $EFFECTIVE_MOD_URL ..."
       if ! curl -sSL -o /tmp/${EFFECTIVE_MOD_URL##*/} $EFFECTIVE_MOD_URL; then
@@ -69,12 +87,12 @@ do
         mv /tmp/${EFFECTIVE_MOD_URL##*/} /data/mods/${EFFECTIVE_MOD_URL##*/}
       fi
       rm -f /tmp/${EFFECTIVE_MOD_URL##*/}
-      ;;
-    *)
-      log "Invalid URL given for modpack: Must be HTTP or HTTPS and a JAR file"
-      ;;
-  esac
-done
+
+    else
+      log "ERROR Invalid URL given in MODS: $i"
+      exit 1
+    fi
+  done
 fi
 
 if [[ "$MANIFEST" ]]; then