sudo apt install -y debian-keyring debian-archive-keyring apt-transport-https 
curl -1sLf 'https://dl.cloudsmith.io/public/caddy/stable/gpg.key' | sudo tee /etc/apt/trusted.gpg.d/caddy-stable.asc 
curl -1sLf 'https://dl.cloudsmith.io/public/caddy/stable/debian.deb.txt' | sudo tee /etc/apt/sources.list.d/caddy-stable.list 
sudo apt update 
sudo apt install caddy

domain
# Set this path to your site's directory.
#root * /usr/share/caddy
root * /var/www/html

# Enable the static file server.
file_server

# Another common task is to set up a reverse proxy:
# reverse_proxy localhost:8080

# Or serve a PHP site through php-fpm:
#php_fastcgi unix//run/php/php7.4-fpm.sock

#encode gzip

# Refer to the Caddy docs for more information:
# https://caddyserver.com/docs/caddyfile
tls {
    dns cloudflare <cloudflare_api_here>
}
# 如使用自己的ssl证书，则参照下面一行:
# tls /path/to/certificate /path/to/privkey

@websocket {
  path /wspath
  header Connection *Upgrade*
  header Upgrade websocket
}

reverse_proxy @websocket localhost:wsport

reverse_proxy /h2path http://localhost:h2port {
  #header_up Host {http.request.host}
  #header_up X-Real-IP {http.request.remote.host}
  #header_up X-Forwarded-For {http.request.remote.host}
  #header_up X-Forwarded-Port {http.request.port}
  #header_up X-Forwarded-Proto {http.request.scheme}
  transport http {
    #tls
    #tls_insecure_skip_verify
    versions h2c 2
  }
}