Install a loading screen
To install your loading screen, you must first download one from the FiveM Forums
You must then rename it to loadingscreen.
Now you connect to your Gameserver via FTP and upload it to the resources folder.
As a last step you have to enter it into the Server.cfg. For this you have to go to Config once and add it.
There you enter the following start loadingscreen and save it afterwards
Now you can start your server and the loadingscreen will show ingame.