Add systemd scripts and instructions

Makefile

@@ -0,0 +1,19 @@
+install:
+	cp hetzner-ddns.py /usr/local/bin
+	cp etc/hetzner-ddns.conf.example /etc
+	cp etc/systemd/hetzner-ddns.service /etc/systemd/system/
+
+uninstall:
+	rm /usr/local/bin/hetzner-ddns.py
+	rm /etc/hetzner-ddns.conf.example
+	rm /etc/systemd/system/hetzner-ddns.service
+
+enable:
+	systemctl enable hetzner-ddns
+
+disable:
+	systemctl disable hetzner-ddns
+
+start:
+	systemctl start hetzner-ddns
+

README.md

@@ -24,6 +24,35 @@ Options:
   --disable-v6          Do not update IPv6 address
 ```
 
+## Running during boot
+
+The instructions below were tested on Ubuntu Linux 20.04 LTS. 
+
+1. Install `python3` and `pip`:
+
+  apt install python3
+
+2. Install package dependencies:
+
+  pip install docopt
+
+3. Clone the repository somewhere:
+
+  cd /opt
+  git clone https://github.com/iSoron/hetzner-ddns.git
+
+4. Install the script system-wide:
+
+  cd hetzner-ddns
+  sudo make install
+
+5. Create a configuration file in `/etc/hetzner-ddns.conf` with you API token. See `/etc/hetzner-ddns.conf.example` for an example.
+
+6. Run script and enable it during boot:
+
+  systemctl start hetzner-ddns
+  systemctl enable hetzner-ddns
+
 ## License
 
 MIT

etc/systemd/hetzner-ddns.service

@@ -0,0 +1,11 @@
+[Unit]
+Description=Hetzner Dynamic DNS Updater
+After=network-online.target
+Wants=network-online.target
+
+[Service]
+Type=oneshot
+ExecStart=/usr/local/bin/hetzner-ddns.py
+
+[Install]
+WantedBy=multi-user.target