安装 Caddy 

二进制安装包地址 https://github.com/caddyserver/caddy/releases 

CentOS

yum install caddy
systemctl enable caddy 
systemctl start caddy 

Ubuntu

sudo apt install -y debian-keyring debian-archive-keyring apt-transport-https
curl -1sLf 'https://dl.cloudsmith.io/public/caddy/stable/gpg.key' | sudo apt-key add -
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

Docker

# 下载caddy
docker pull caddy:2.6.2

# 安装caddy容器
docker run -itd \
--name my_caddy \
-p 80:80 \
-p 443:443 \
-v /home/caddy/srv:/srv \
-v /home/caddy/data:/data \
-v /home/caddy/config:/config \
caddy:2.6.2

源码构建 

要求：
Go 1.16 或更新的版本

克隆仓库源码：
git clone "https://github.com/caddyserver/caddy.git"

构建：
cd caddy/cmd/caddy/
go build