Refactor docker-compose to match standard NPM setup (remove internal network)

docker-compose.yml

@@ -1,14 +1,17 @@
 version: '3.8'
 
 services:
-  app:
-    container_name: nonograms-app
+  nonograms:
+    container_name: nonograms
     build:
       context: .
       dockerfile: Dockerfile
-    ports:
-      - "8081:80"
+    expose:
+      - "80"
     restart: unless-stopped
-    # Uncomment the following lines if you want to mount the configuration locally for development/testing
-    # volumes:
-    #   - ./nginx.conf:/etc/nginx/conf.d/default.conf:ro
+    networks:
+      - npm_public
+
+networks:
+  npm_public:
+    external: true