fix(compose): remove external network declarations from compose templates

apps/api/src/main.py

@@ -122,13 +122,7 @@ services:
       - {{REPO_PATH}}:/config/workspace
     ports:
       - "8443:8443"
-    networks:
-      - backend
-    restart: unless-stopped
-
-networks:
-  backend:
-    external: true""",
+    restart: unless-stopped""",
                 "default_port": 8443,
                 "required_variables": ["REPO_PATH", "TOOL_NAME"],
             },
@@ -150,13 +144,7 @@ services:
       - {{REPO_PATH}}:/home/jovyan/work
     ports:
       - "8888:8888"
-    networks:
-      - backend
-    restart: unless-stopped
-
-networks:
-  backend:
-    external: true""",
+    restart: unless-stopped""",
                 "required_variables": ["REPO_PATH", "TOOL_NAME"],
             },
             {
@@ -188,16 +176,10 @@ services:
              tail -f /dev/null"
     stdin_open: true
     tty: true
-    networks:
-      - backend
     restart: unless-stopped
 
 volumes:
-  opencode_home:
-
-networks:
-  backend:
-    external: true""",
+  opencode_home:""",
                 "required_variables": ["REPO_PATH", "TOOL_NAME"],
             },
         ]