负载均衡 、 静态缓存

upstream project {
  server 22.22.22.2:3000;
  server 22.22.22.3:3000;
  server 22.22.22.5:3000;
}

server {
  listen 80;

  location / {
    proxy_pass http://project;
  }
  location ~* \.(css|js|gif|jpe?g|png)$ {
    expires 168h;

  }
  location /api {
    expires 10m;
  }
}