Create systemd guide

docs/systemd.md

@@ -0,0 +1,22 @@
+### Service config for systemd
+The file chibisafe-example.service is to be moved to `/etc/systemd/system/chibisafe.service` 
+
+You will need to edit the parameters:
+- `User` to be the username/uid of your chibisafe instance
+- `WorkingDirectory` to the **FULL** path to your chibisafe, `/home/chibisafe/chibisafe` for example.
+- `EnvironmentFile` the same as the above, with the addition of `/.env`, `/home/chibisafe/chibisafe/.env`
+
+```[Unit]
+Description=chibisafe, easy to use file uploader
+After=network.target
+
+[Service]
+Type=simple
+User=chibisafe
+WorkingDirectory=/home/chibisafe/chibisafe
+EnvironmentFile=/home/chibisafe/chibisafe/.env
+ExecStart=/usr/bin/npm run start
+Restart=always
+
+[Install]
+WantedBy=multi-user.target```