server {
  listen ${PORT} default_server;
  listen [::]:${PORT} default_server;
  location / {
    root   /usr/share/nginx/html;
    index  index.html index.htm;
    try_files $uri $uri/ /index.html;
    add_header Cross-Origin-Opener-Policy same-origin;
    add_header Cross-Origin-Embedder-Policy require-corp;
    add_header Cross-Origin-Resource-Policy same-origin;
    proxy_set_header Host $host;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header X-Forwarded-Proto $http_x_forwarded_proto;
  }
  error_page   500 502 503 504  /50x.html;
  location = /50x.html {
  location = /50x.html {
    root   /usr/share/nginx/html;
  }
}