CORS on Caddyserver version 2

To add the CORS authorization to the header using Caddy 2, simply add the following lines inside the site declaration:

sitename.com {
  file_server
  encode zstd gzip

  header {
    Access-Control-Allow-Headers *
    Access-Control-Allow-Methods *
    Access-Control-Allow-Origin *
  }
  @options {
    method OPTIONS
  }
  respond @options 204
}