vern.Caddyfile

{
    admin off
    auto_https off
    order respond before reverse_proxy
    #email ${USER}@vern.cc
    default_bind unix//home/{$USER}/.webserver.sock
    log {
      format console
    }
}

http://preview-ajhalili2006.vern.cc {
    # use an random port here to avoid port collision hellscape
    reverse_proxy * localhost:18034
}