Add debian packaging files

Cargo.toml

@@ -29,3 +29,6 @@ dirs = "5"
 strip = "symbols"
 lto = "thin"
 codegen-units = 1
+
+[package.metadata.deb.systemd-units]
+unit-scripts = "systemd/"

systemd/cloudflare-ddns.service

@@ -0,0 +1,30 @@
+[Unit]
+Description=Run the Cloudflare DDNS script
+Wants=network-online.target
+After=network-online.target
+
+[Service]
+Type=oneshot
+ExecStart=/usr/bin/cloudflare-ddns run
+
+# Security
+NoNewPrivileges=true
+
+# Sandboxing config
+ProtectSystem=true
+PrivateTmp=true
+PrivateDevices=true
+ProtectHostname=true
+ProtectClock=true
+ProtectKernelTunables=true
+ProtectKernelModules=true
+ProtectKernelLogs=true
+ProtectControlGroups=true
+RestrictNamespaces=true
+LockPersonality=true
+MemoryDenyWriteExecute=true
+RestrictRealtime=true
+RestrictSUIDSGID=true
+
+[Install]
+WantedBy=multi-user.target

systemd/cloudflare-ddns.timer

@@ -0,0 +1,9 @@
+[Unit]
+Description=Run the Cloudflare DDNS script hourly
+
+[Timer]
+OnBootSec=1min
+OnUnitActiveSec=1hr
+
+[Install]
+WantedBy=timers.target