fix:#34 reverse config and compose prod fixed

docker-compose.prod.yml

@@ -6,20 +6,19 @@ services:
     command: "--http=0.0.0.0:8090 --dir=/htwkalender/data/pb_data"
     pull_policy: always
     restart: always
-    # open port 8090
-    ports:
-      - "8090:8090"
     volumes:
       - pb_data:/htwkalender/data
+    networks:
+      - "net"
 
   htwkalender-frontend:
     image: DOCKER_REGISTRY_REPO:frontend # DOCKER_REGISTRY_REPO will be replaced by CI
     pull_policy: always
     restart: always
-    ports:
-      - "8000:8000"
     depends_on:
       - htwkalender-backend
+    networks:
+      - "net"
 
   rproxy:
     image: bitnami/nginx:1.25
@@ -31,6 +30,12 @@ services:
       - htwkalender-frontend
     ports:
       - "80:80"
+    networks:
+      - "net"
 
 volumes:
   pb_data:
+
+networks:
+  net:
+    external: true