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Caddy

Install​

# Official apt repo & package
sudo apt install -y debian-keyring debian-archive-keyring apt-transport-https
curl -fsSL https://dl.cloudsmith.io/public/caddy/stable/gpg.key | sudo tee /usr/share/keyrings/caddy-stable-archive-keyring.gpg >/dev/null
curl -fsSL 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 -y caddy
sudo systemctl enable --now caddy

The official package installs a systemd unit; enabling it makes Caddy persistent.

Basic reverse proxy + automatic HTTPS​

Edit /etc/caddy/Caddyfile:

example.com {
  reverse_proxy 127.0.0.1:3000
}

Apply:

sudo caddy validate --config /etc/caddy/Caddyfile
sudo systemctl reload caddy

Caddy automatically obtains/renews certificates from Let’s Encrypt and redirects HTTP→HTTPS by default when using a domain block like above. Reverse proxy behavior is via the reverse_proxy directive.

Verify​

curl -I http://example.com
curl -I https://example.com
journalctl -u caddy -n 100 --no-pager

Notes​

  • Caddy install docs: Caddy.
  • Caddy reverse proxy quick-start: Caddy.