Converted mohist deployment to use image helper

examples/docker-compose-mohist.yml

@@ -0,0 +1,17 @@
+version: "3.8"
+
+services:
+  mc:
+    image: itzg/minecraft-server
+    ports:
+      - "25565:25565"
+    environment:
+      EULA: "TRUE"
+      TYPE: MOHIST
+      VERSION: 1.12.2
+      DEBUG: "true"
+    volumes:
+      - data:/data
+
+volumes:
+  data: {}