Support multiple values for COPY_PLUGINS_SRC, COPY_MODS_SRC, and COPY_CONFIG_SRC (#3377)

examples/paper/compose.yml

@@ -1,16 +1,16 @@
 services:
   mc:
     image: itzg/minecraft-server
-    container_name: paper
+    tty: true
+    stdin_open: true
     environment:
       EULA: "true"
       TYPE: PAPER
-      VIEW_DISTANCE: 10
       MEMORY: 2G
     ports:
       - "25565:25565"
     volumes:
-      - mc-paper:/data
+      - mc-data:/data
     restart: unless-stopped
 volumes:
-  mc-paper: {}
+  mc-data: {}