Improve security

deployment/docker-compose.yml

@@ -5,8 +5,6 @@ services:
       context: ..
     environment:
       PORT: 8300
-    ports:
-      - "8300:8300"
     volumes:
       - "data:/app/data"
     develop:
@@ -16,6 +14,8 @@ services:
           target: /app
         - action: rebuild
           path: ../backend/requirements.txt
+    networks:
+      - main
 
   frontend:
     build: 
@@ -37,7 +37,15 @@ services:
           target: /server/server.js
         - action: rebuild
           path: package.json
+    networks:
+      - main
+      - default
 
 volumes:
   data:
-    name: fromchat-data
+    name: fromchat-data
+
+networks:
+  main:
+    driver: bridge
+    internal: true # isolate from the outside world