events {
    worker_connections 1024;
}

http {
    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;

    sendfile        on;
    keepalive_timeout  65;

    # 静态文件服务器
    server {
        listen       80;
        server_name  localhost;

        # 根目录指向 docs 文件夹
        root /usr/share/nginx/html/docs;
        index test-chat.html index.html index.htm;

        # 主要测试页面
        location / {
            try_files $uri $uri/ /test-chat.html;
        }

        # 直接访问 test-chat.html
        location /test-chat.html {
            add_header Cache-Control "no-cache, no-store, must-revalidate";
            add_header Pragma "no-cache";
            add_header Expires "0";
        }

        # 其他静态文件
        location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|html)$ {
            expires 7d;
            add_header Cache-Control "public, immutable";
        }

        # 禁止访问隐藏文件
        location ~ /\. {
            deny all;
            access_log off;
            log_not_found off;
        }

        # 自定义错误页面
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   /usr/share/nginx/html;
        }
    }
}