upstream upstream_server {
  server 127.0.0.1:3000;
}

server {
    listen 80;
    index index.html;
    server_name _;
    root /app/public;

    proxy_http_version 1.1;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection 'upgrade';
    proxy_set_header Host $host;
    proxy_cache_bypass $http_upgrade;

    location ~* \.(?:ico|gif|jpe?g|png|woff2?|eot|otf|ttf|svg|js|css)$ {
        try_files $uri @upstream_server;
        expires 30d;
        add_header Pragma public;
        add_header Cache-Control "public";
    }

    location / {
        proxy_pass http://upstream_server;
    }
}