I worked on this for a while now and im finally done:
I made a website where you can basically generate your own Loading Screen, edit it and use it for your server completely for free.
The only thing you need to have is a Steam Account to log in!
so you do not need a Server!
The Loading Screen has many options you can change to make it fit for your Server.
-(NEW 02-03-2017) Uploading of own Background images
And there are no Watermarks!
The Site is in Beta at the moment so there will be a few things added in the future:
So if you want your own Loadingscreen now check out my Website:
Here is an example https://wiphosting.org/loading-screens/users/index.php?id=1337