Migrate to linuxmuster's venv.

Author: kiarn

lib/systemd/system/linuxmuster-api.service

@@ -4,7 +4,7 @@ After=network.target
 
 [Service]
 WorkingDirectory=/usr/lib/python3/dist-packages/linuxmusterApi
-ExecStart=/usr/lib/python3/dist-packages/linuxmusterApi/main.py
+ExecStart=/opt/linuxmuster/bin/python3 /usr/lib/python3/dist-packages/linuxmusterApi/main.py
 
 [Install]
 WantedBy=multi-user.target