examples: updated bmc4 example (#2822)

examples/docker-compose-mods-mount.yml

@@ -2,7 +2,7 @@ services:
   minecraft:
     image: itzg/minecraft-server
     volumes:
-      - data:/data
+      - ./data:/data
       - ./mods:/mods
     ports:
       - "25565:25565"
@@ -10,10 +10,5 @@ services:
       EULA: "true"
       TYPE: "FORGE"
       VERSION: "1.19.2"
-      DEBUG: "true"
-      SETUP_ONLY: "true"
-    tty: True
-    stdin_open: True
-
-volumes:
-  data: {}
+    tty: true
+    stdin_open: true