Add systemd unit to debian package

Cargo.toml

@@ -7,7 +7,16 @@ description = "Application for automatically updating Cloudflare DNS records"
 license = "GPL-3.0-or-later"
 
 [package.metadata.deb]
+extended-description = "Application for automatically updating Cloudflare DNS records"
+maintainer-scripts = ""
 revision = "1"
+
+[package.metadata.deb.systemd-units]
+enable = true
+start = true
+restart-after-upgrade = true
+stop-on-upgrde = true
+
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]

unit-scripts/cloudflare-dns-updater.service

@@ -0,0 +1,13 @@
+[Unit]
+Description="Application for automatically updating Cloudflare DNS records"
+After=syslog.target
+After=network-online.target
+
+[Service]
+Type=simple
+ExecStart=/usr/local/bin/cloudflare-dns-updater
+Restart=always
+RestartSec=3
+
+[Install]
+WantedBy=multi-user.target