my nginx config example

default

server {
  listen 80;
  server_name YOUR_SERVERS_IP_ADDRESS;

  location ~ ^/(js/|img/|css/) {
    root /path/to/public/static/;
    access_log off;
    expires 24h;
  }
  location / {
    proxy_pass "http://127.0.0.1:8080";
    proxy_http_version 1.1;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection 'upgrade';
    proxy_cache_bypass $http_upgrade;
    expires -1;
  }
}

add serve static files