add systemd service template

README.md

@@ -20,4 +20,7 @@ example.com {
 
         reverse_proxy :4567
 }
-```
+```
+
+## Autostart
+You can use the `predator_pics.service` template and adjust it to your own needs and setup. Afterwards, move it to `/etc/systemd/system` and enable and start it with `(sudo) systemctl enable --now predator_pics`. 

predator_pics.service

@@ -0,0 +1,15 @@
+[Unit]
+Description=Predator Pics
+After=network.target
+
+[Service]
+Type=simple
+User=user_here
+ExecStart=/usr/bin/ruby /path/to/server.rb
+Restart=always
+WorkingDirectory=/path/to/server.rb
+StandardOutput=journal
+StandardError=journal
+
+[Install]
+WantedBy=multi-user.target