Adding Vanilla Tweaks Options (#1246)

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: {}
+  data: {}