Add an example systemd service for payjoin-mailroom

payjoin-mailroom/README.md

@@ -32,6 +32,15 @@ The rust-payjoin flake also provides `payjoin-mailroom` as a package.
 nix run .#payjoin-mailroom -- --config payjoin-mailroom/config.toml
 ```
 
+### systemd
+
+```sh
+# A minimal [payjoin-mailroom.example.service](payjoin-mailroom.example.service) unit file is provided for convenience. Edit paths and User= as your setup requires.
+vim /etc/systemd/system/payjoin-mailroom.service
+systemctl daemon-reload
+systemctl enable --now payjoin-mailroom
+```
+
 ## Telemetry
 
 payjoin-mailroom supports **optional** OpenTelemetry-based telemetry (metrics).

payjoin-mailroom/payjoin-mailroom.example.service

@@ -0,0 +1,15 @@
+[Unit]
+Description=Payjoin Mailroom
+After=network-online.target
+Wants=network-online.target
+
+[Service]
+Type=simple
+User=root
+WorkingDirectory=/root/rust-payjoin/payjoin-mailroom
+ExecStart=/root/.cargo/bin/payjoin-mailroom --config /root/rust-payjoin/payjoin-mailroom/config.toml
+Restart=on-failure
+RestartSec=5
+
+[Install]
+WantedBy=multi-user.target