Update systemd.service

conf/systemd.service

@@ -8,7 +8,7 @@ User=__APP__
 Group=__APP__
 WorkingDirectory=__INSTALL_DIR__/
 EnvironmentFile=__INSTALL_DIR__/.env
-ExecStart=/usr/bin/bash -c 'source __INSTALL_DIR__/venv/bin/activate &&  open-webui serve'
+ExecStart=/usr/bin/bash -c 'source __INSTALL_DIR__/venv/bin/activate &&  open-webui serve --port __PORT__'
 StandardOutput=append:/var/log/__APP__/__APP__.log
 StandardError=inherit
 TimeoutStartSec=300