- Remove entrypoint now implemented by rx3/server-mga9 image,

- Minor compose / dockerfile args improvments.

compose.yaml

@@ -8,7 +8,7 @@ services:
   default:
     container_name: ${IMG_ID}
     
-    image: docker.xor.rx3:5000/rx3/${IMG_ID}:${IMG_VERSION}
+    image: ${IMG_URL}
     
     build:
       context: .