feat: add systemd libretime.target

- add wanted by
- instantly start services in vagrant

install

@@ -687,6 +687,9 @@ fi
 ########################################################################################
 
 section "Services"
+
+install_service "libretime.target" "$SCRIPT_DIR/installer/systemd/libretime.target"
+
 systemctl daemon-reload
 
 if apache2ctl configtest; then
@@ -716,10 +719,16 @@ ${cyan}\
 $ sudo -u $LIBRETIME_USER libretime-api migrate
 
 ${yellow}\
-Finally, run the following command to configure the default icecast passwords in the database:
+Run the following command to configure the default icecast passwords in the database:
 
 ${cyan}\
 $ sudo libretime-api set_icecast_passwords --from-icecast-config
 
+${yellow}\
+Finally, start LibreTime using the following command:
+
+${cyan}\
+$ sudo systemctl start libretime.target
+
 ${reset}"
 fi