Make sure the maven container doesn't have internet

docker-compose.yml

@@ -11,6 +11,9 @@ services:
       - ./data:/app/data
     ports:
       - "9001:80"
+    networks:
+      - default
+      - nonet
     restart: unless-stopped
   maven-sync-job:
     build: ./sync
@@ -18,4 +21,9 @@ services:
       - repo
     volumes:
       - ./examples:/poms
-    network_mode: "service:repo"
+    networks:
+      - nonet
+
+networks:
+  nonet:
+    internal: true