Fixed /plugins support for Paper servers

examples/paper-build-plugins/Dockerfile

@@ -0,0 +1,5 @@
+FROM itzg/minecraft-server
+
+ENV TYPE=PAPER
+
+COPY plugins/*.jar /plugins/

examples/paper-build-plugins/docker-compose.yml

@@ -0,0 +1,9 @@
+version: '3.7'
+
+services:
+  mc:
+    build: .
+    environment:
+      EULA: "TRUE"
+    ports:
+    - 25565:25565

examples/paper-build-plugins/plugins/.gitignore

@@ -0,0 +1 @@
+*.jar

examples/paper-build-plugins/plugins/README.md

@@ -0,0 +1 @@
+Download Bukkit/Spigot plugin jars, such as [WorldEdit](https://dev.bukkit.org/projects/worldedit/files) and place them here. At image build time the `COPY` step will place those jars in `/plugins`. At container startup, the contents of `/plugins` are sync'ed into `/data/plugins` for use with Bukkit/Spigot/Paper server types.

start-minecraftFinalSetup

@@ -64,15 +64,17 @@ do
   fi
 done
 
-mkdir -p /data/plugins
+case ${TYPE} in
-if [ "$TYPE" = "SPIGOT" ]; then
+  SPIGOT|BUKKIT|PAPER)
-  if [ -d /plugins ]; then
+    mkdir -p /data/plugins
-    log "Copying any Bukkit plugins over..."
+    if [ -d /plugins ]; then
-    # Copy plugins over using rsync to allow deeply nested updates of plugins
+      log "Copying plugins over..."
-    # only updates files if the source file is newer and print updated files
+      # Copy plugins over using rsync to allow deeply nested updates of plugins
-    rsync -a --out-format="update:%f:Last Modified %M" --prune-empty-dirs --update /plugins /data
+      # only updates files if the source file is newer and print updated files
-  fi
+      rsync -a --out-format="update:%f:Last Modified %M" --prune-empty-dirs --update /plugins /data
-fi
+    fi
+    ;;
+esac
 
 EXTRA_ARGS=""
 # Optional disable console