Add systemd file

Author: leoplo

README.md

@@ -63,6 +63,15 @@ To start pim-dm process in background, one can use
   ```
 or run it with a daemonizing tool (systemd, supervisord, OpenRC ...).
 
+For systemd you can simply run
+  ```
+  sudo systemd-run pim-dm -start
+  ```
+or copy [pim-dm.service](daemon/pim-dm.service) to `/usr/lib/systemd/system/pim-dm.service` and then start pim-dm process with command:
+  ```
+  sudo systemctl start pim-dm
+  ```
+
 
 #### Multi daemon support
 

daemon/pim-dm.service

@@ -0,0 +1,10 @@
+[Unit]
+Description=Multicast routing daemon
+#ConditionPathExists=/etc/pim-dm/conf.yaml
+
+[Service]
+#WorkingDirectory=/etc/pim-dm
+#ExecStart=/usr/local/bin/pim-dm -config conf.yaml
+ExecStart=/usr/local/bin/pim-dm -start
+ExecStop=/usr/local/bin/pim-dm -stop
+