A default for nginx configuration file.

nginx.default.conf

server {

  listen       80;
  server_name  localhost;

  root      /usr/share/nginx/html;
  charset   utf-8;

  index     index.html;

  # Root
  location / {

    # First attempt to serve request as file, then
    # as directory, then fall back to displaying a 404.
    try_files $uri $uri/ /index.html =404;
  }

  # Enable pre-compressed copies (.gz) of static files available.
  location ~* \.(js)$ {
    gzip_static on;
  }

  # API
  location /api/ {

    # This variable will be replaced
    proxy_pass          API_URLapi/;

    add_header          Access-Control-Allow-Origin *;
    add_header          Access-Control-Allow-Credentials true;
    proxy_set_header    Host $host;
    proxy_set_header    X-Real-IP $remote_addr;
    proxy_set_header    X-Forwarded-For $proxy_add_x_forwarded_for;

    if ($request_method = OPTIONS) {
      add_header Access-Control-Allow-Origin "*";
      add_header Access-Control-Allow-Methods "GET,POST,OPTIONS,PUT,DELETE,PATCH";
      add_header Access-Control-Allow-Headers 'Authorization,Content-Type,Accept,Origin,Cache-Control,Keep-Alive,If-Modified-Since';
      add_header Access-Control-Allow-Credentials "true";
      add_header Access-Control-Max-Age 1728000;
      add_header Content-Length 0;
      add_header Content-Type text/plain;
      add_header Cache-Control 'max-age=0';
      return 204;
    }
  }

  # Images, Scripts & Styles
  location ~* \.(png|jpg|jpeg|gif|mp3|js|css|ico|svg|gz|mp4|webm)$ {
    expires     4h;
    access_log  off;
    add_header  Cache-Control "public";
  }

  # Fonts
  location ~* \.(?:ttf|ttc|otf|eot|woff|woff2)$ {
    expires     1M;
    access_log  off;
    add_header  Cache-Control "public";
  }

  # Prevent dot file access
  location ~* (?:^|/)\. {
      deny all;
      access_log off;
      log_not_found off;
  }

  # Prevent Backup / Log / Script access
  location ~* (?:\.(?:bak|conf|log|sh)|~)$ {
      deny all;
      access_log off;
      log_not_found off;
  }
}