feat: Docker化部署完成 - 前端管理后台和AI服务

- 添加 hzhub-admin Dockerfile (Nginx)
- 添加 hzhub-admin nginx.conf (API代理、SSE支持、Gzip)
- 添加 hzhub-ai Dockerfile (Spring Boot)
- 添加 hzhub-gateway Dockerfile
- 更新 docker-compose.yml 添加前端和AI服务
- 更新 README.md 完善部署文档
- 配置 application-dev.yml 数据库连接

所有服务现在可通过 docker-compose up -d 一键启动:
- hzhub-admin:5666 (管理后台)
- hzhub-ai:6039 (AI服务)
- mysql:3306, redis:6379, weaviate:28080, n8n:5678

hzhub-admin/nginx.conf

@@ -0,0 +1,54 @@
+server {
+    listen 5666;
+    server_name localhost;
+    root /usr/share/nginx/html;
+    index index.html;
+
+    # Gzip 压缩
+    gzip on;
+    gzip_vary on;
+    gzip_min_length 1024;
+    gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript;
+
+    # 静态资源缓存
+    location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot)$ {
+        expires 1y;
+        add_header Cache-Control "public, immutable";
+    }
+
+    # API 代理到后端服务
+    location /api/ {
+        proxy_pass http://hzhub-ai:6039/;
+        proxy_http_version 1.1;
+        proxy_set_header Upgrade $http_upgrade;
+        proxy_set_header Connection 'upgrade';
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+        proxy_cache_bypass $http_upgrade;
+        proxy_read_timeout 86400;
+    }
+
+    # SSE 支持
+    location /api/sse/ {
+        proxy_pass http://hzhub-ai:6039/sse/;
+        proxy_http_version 1.1;
+        proxy_set_header Connection '';
+        proxy_buffering off;
+        proxy_cache off;
+        proxy_read_timeout 86400;
+    }
+
+    # 前端路由支持 - 所有路径指向 index.html
+    location / {
+        try_files $uri $uri/ /index.html;
+    }
+
+    # 健康检查
+    location /health {
+        access_log off;
+        return 200 "healthy\n";
+        add_header Content-Type text/plain;
+    }
+}