Docs Site is DOWN is currently down.
Other than the forum unfortunately I am unsure where else to report this.

“Internal Server Error”

Seems that someone has fixed this and the documentation site is operational again.
What is going on that it routinely appears to be not available?

It is being updated quite often and every other PR is being merged, if it goes down, try and wait for 10mins max I assume and you’ll have access to it again.