default.conf

server {
   listen 80;

   # location ~* \.(?:css|js)$ {
   #    try_files $uri =404;
   #    expires 1y;
   #    access_log off;
   #    add_header Cache-Control "public";
   # }

   # Any route containing a file extension (e.g. /devicesfile.js)
   # location ~ ^.+\..+$ {
   #    try_files $uri =404;
   # }

   # Any route that doesn't have a file extension (e.g. /devices)
   location / {
      root      /usr/share/nginx/html;
      index     index.html index.htm;
      try_files $uri $uri/ /index.html;

      if ($request_method = 'OPTIONS') {
         add_header 'Access-Control-Allow-Origin: $http_origin');
         add_header 'Access-Control-Allow-Origin: GET, POST, DELETE, PUT, PATCH, OPTIONS');
         add_header 'Access-Control-Allow-Credentials: true');
         add_header 'Vary: Origin');
      }

      add_header 'Access-Control-Allow-Origin' "$http_origin" always;
      add_header 'Access-Control-Allow-Credentials' 'true' always;
      add_header 'Access-Control-Allow-Methods' 'GET, POST, PUT, PATCH, DELETE, OPTIONS' always;
      add_header 'Access-Control-Allow-Headers' 'Accept,Authorization,Cache-Control,Content-Type,DNT,If-Modified-Since,Keep-Alive,Origin,User-Agent,X-Requested-With' always;
   }

   error_page 500 502 503 504  /50x.html;
   location = /50x.html {
      root   /usr/share/nginx/html;
   }
}