🎨 更新环境配置，添加 Dockerfile，优化代码结构

web-admin/nginx.conf

@@ -0,0 +1,33 @@
+server {
+    listen 80;
+    server_name _;
+
+    # 文件上传大小限制 50MB
+    client_max_body_size 50m;
+
+    root /usr/share/nginx/html;
+    index index.html;
+
+    # 将 /api/ 请求反代到后端（去掉 /api 前缀，与 vite dev proxy 行为一致）
+    location /api/ {
+        proxy_pass http://server:8888/;
+        proxy_http_version 1.1;
+        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_read_timeout 35s;
+        proxy_send_timeout 35s;
+        proxy_connect_timeout 10s;
+    }
+
+    # SPA fallback：所有非文件路径返回 index.html
+    location / {
+        try_files $uri $uri/ /index.html;
+    }
+
+    # 静态资源缓存
+    location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff2?)$ {
+        expires 7d;
+        add_header Cache-Control "public, immutable";
+    }
+}