nginx.conf

# nginx folder with nginx.conf file should be in the root folder near node_modules because of docker.standalone
server {
  # any port above 1024 will work (except 8080 which is already used by nginx default setup)
  listen 3000;

  if($request_method !~ ^(GET|HEAD)$ ) {
    return 405;
  }
  add_header X-Frame-Options "SAMEORIGIN";
  add_header X-XSS-Protection "1; mode=block";
  add_header Content-Security-Policy "default-src 'self' https:; script-src 'self' https: 'unsafe-inline' 'unsafe-eval';connect-src https: http: localhost:* ws://localhost:* 'self'; style-src 'self' 'unsafe-inline' https:; object-src 'none'; font-src https: 'self' data:" always;

  location / {
    root   /usr/share/nginx/app;
    index  index.html index.htm;
    try_files $uri $uri/ /index.html;
  }

  error_page   500 502 503 504  /50x.html;

  location = /50x.html {
    root   /usr/share/nginx/html;
  }

  # gzip
  gzip            on;
  gzip_vary       on;
  gzip_proxied    on;
  gzip_comp_level 6;
  gzip_types      text/plain text/css text/xml application/json application/javascript application/rss+xml application/atom+xml image/svg+xml;
}