caddy systemd unit file

caddy.service

[Unit]
Description=Caddy HTTP/2 web server
Documentation=https://caddyserver.com/docs
After=network-online.target
Wants=network-online.target systemd-networkd-wait-online.service

[Service]
Restart=on-failure


; User and group the process will run as.
User=www-data
Group=www-data

WorkingDirectory=/var/www

; Letsencrypt-issued certificates will be written to this directory.
Environment=HOME=/etc/ssl/caddy

; Always set "-root" to something safe in case it gets forgotten in the Caddyfile.
ExecStart=/usr/local/bin/caddy -log stdout -agree=true -conf=/var/www/Caddyfile -root=/var/www
ExecReload=/bin/kill -USR1 $MAINPID

; Limit the number of file descriptors; see `man systemd.exec` for more limit settings.
LimitNOFILE=1048576
; Unmodified caddy is not expected to use more than that.
LimitNPROC=64


; Drop all other capabilities. Important if you run caddy as privileged user (which you should not).
;CapabilityBoundingSet=CAP_NET_BIND_SERVICE
; … but permit caddy to open ports reserved for system services.
;   This could be redundant here, but is needed in case caddy runs as nobody:nogroup.
;AmbientCapabilities=CAP_NET_BIND_SERVICE
; … and prevent gaining any new privileges.
;NoNewPrivileges=true

; Caveat: Some plugins need additional capabilities. Add them to both above lines.
; - plugin "upload" needs: CAP_LEASE

[Install]
WantedBy=multi-user.target