misc: organize more of examples into subdirs as compose projects (#3608)

examples/generic-pack/rlcraft/compose.yml

@@ -0,0 +1,25 @@
+services:
+  mc:
+    image: itzg/minecraft-server:java8
+    volumes:
+    - data:/data
+    - ./modpacks:/modpacks:ro
+    environment:
+      EULA: "true"
+      TYPE: "FORGE"
+      VERSION: "1.12.2"
+      FORGE_VERSION: "14.23.5.2860"
+      OVERRIDE_SERVER_PROPERTIES: "true"
+      DIFFICULTY: "hard"
+      MAX_TICK_TIME: "-1"
+      ALLOW_FLIGHT: "true"
+      ENABLE_COMMAND_BLOCK: "true"
+      VIEW_DISTANCE: "10"
+      MEMORY: "4G"
+      # Download from https://www.curseforge.com/minecraft/modpacks/rlcraft and place in modpacks subdir
+      GENERIC_PACK: "/modpacks/RLCraft+Server+Pack+1.12.2+-+Release+v2.9.1c.zip"
+    ports:
+      - 25565:25565
+
+volumes:
+  data: