diff --git a/backend/docker-compose.dev.yml b/backend/docker-compose.dev.yml
index becacce..7ad5ccb 100644
--- a/backend/docker-compose.dev.yml
+++ b/backend/docker-compose.dev.yml
@@ -1,5 +1,9 @@
 version: '3.8'
 
+networks:
+  backend-network:
+    driver: bridge
+
 services:
   # Nginx 网关
   nginx:
@@ -10,6 +14,8 @@ services:
       - ./nginx.conf:/etc/nginx/nginx.conf:ro
     depends_on:
       - gateway
+    networks:
+      - backend-network
 
   # 网关服务
   gateway:
@@ -24,6 +30,8 @@ services:
     depends_on:
       - user-svc
       - redis
+    networks:
+      - backend-network
 
   # 用户服务
   user-svc:
@@ -37,6 +45,8 @@ services:
     command: air -c .air.toml
     depends_on:
       - postgres
+    networks:
+      - backend-network
 
   # 数据库
   postgres:
@@ -50,6 +60,8 @@ services:
     volumes:
       - postgres-data:/var/lib/postgresql/data
       - ./services/user-svc/migrations:/docker-entrypoint-initdb.d
+    networks:
+      - backend-network
 
   # Redis
   redis:
@@ -58,6 +70,8 @@ services:
       - "6379:6379"
     volumes:
       - redis-data:/var/lib/redis/data
+    networks:
+      - backend-network
 
 volumes:
   postgres-data:
diff --git a/backend/docker-compose.yml b/backend/docker-compose.yml
index 5c97652..a4ac789 100644
--- a/backend/docker-compose.yml
+++ b/backend/docker-compose.yml
@@ -1,5 +1,9 @@
 version: '3.8'
 
+networks:
+  backend-network:
+    driver: bridge
+
 services:
   # Nginx 网关
   nginx:
@@ -10,6 +14,8 @@ services:
       - ./nginx.conf:/etc/nginx/nginx.conf:ro
     depends_on:
       - gateway
+    networks:
+      - backend-network
 
   # 网关服务
   gateway:
@@ -21,6 +27,8 @@ services:
     depends_on:
       - user-svc
       - redis
+    networks:
+      - backend-network
 
   # 用户服务
   user-svc:
@@ -31,6 +39,8 @@ services:
       - "9000:9000"
     depends_on:
       - postgres
+    networks:
+      - backend-network
 
   # 数据库
   postgres:
@@ -44,6 +54,8 @@ services:
     volumes:
       - postgres-data:/var/lib/postgresql/data
       - ./services/user-svc/migrations:/docker-entrypoint-initdb.d
+    networks:
+      - backend-network
 
   # Redis
   redis:
@@ -52,6 +64,8 @@ services:
       - "6379:6379"
     volumes:
       - redis-data:/var/lib/redis/data
+    networks:
+      - backend-network
 
   # Proto 编译服务
   proto-builder:
@@ -60,6 +74,8 @@ services:
       dockerfile: Dockerfile
     volumes:
       - ./shared/proto:/proto
+    networks:
+      - backend-network
 
 volumes:
   postgres-data:
diff --git a/backend/nginx.conf b/backend/nginx.conf
new file mode 100644
index 0000000..64313b0
--- /dev/null
+++ b/backend/nginx.conf
@@ -0,0 +1,45 @@
+events {
+    worker_connections 1024;
+}
+
+http {
+    include /etc/nginx/mime.types;
+    default_type application/octet-stream;
+
+    log_format main '$remote_addr - $remote_user [$time_local] "$request" '
+                      '$status $body_bytes_sent "$http_referer" '
+                      '"$http_user_agent" "$http_x_forwarded_for"';
+
+    access_log /var/log/nginx/access.log main;
+    error_log /var/log/nginx/error.log error;
+
+    sendfile on;
+    keepalive_timeout 65;
+
+    upstream gateway {
+        server gateway:8000;
+    }
+
+    server {
+        listen 80;
+        server_name localhost;
+
+        location / {
+            proxy_pass http://gateway;
+            proxy_http_version 1.1;
+            proxy_set_header Upgrade $http_upgrade;
+            proxy_set_header Connection 'upgrade';
+            proxy_set_header Host $host;
+            proxy_cache_bypass $http_upgrade;
+        }
+
+        location /ws {
+            proxy_pass http://gateway;
+            proxy_http_version 1.1;
+            proxy_set_header Upgrade $http_upgrade;
+            proxy_set_header Connection 'upgrade';
+            proxy_set_header Host $host;
+            proxy_cache_bypass $http_upgrade;
+        }
+    }
+}