You can find it in the Crafting Store -> Servers tab here.
I've just fixed the issue on Nameless Hosting for you
Could you send me a link to your site?
The first thing to try is pressing F12 in your browser to open the console; have a look in there for any errors when you view your site.
To use Nameless, you need to have a web server set up, whether this be on one of your own machines or using a web host. You can then upload the Nameless files to your web host, and run through the installer.
There are some free web hosts available such as Nameless Hosting, InfinityFree and 000webhost if you want to try them out.
As for the Discord bot, it's one that you need to compile and host yourself. It's only intended for providing support for common Nameless questions so it probably won't be of much use, but you can find the source here anyway.