> Here is an example. This Go program (a compiler) generates and serves its own website: https://NN-512.com
Not a very good one - clicking the link produces a download dialog on Firefox (I'm guessing because the website neglects to indicate a Content-Type).
Ironically this is an argument against trying to do everything yourself - you might waste time chasing the long tail of thousands of little details that had been solved many times over elsewhere.