Looks good! Just had a walk through the web socket tutorial in your documentation, I have a larger app idea I'd like to build that would use web sockets so it was a good precursor!
I especially like the deno add command, makes adding things more intuitive and is nice that it uses the same command as the rest of Deno rather than with node and seeing npm, yarn and pnpm all over the place. This approach will definitely make tutorials more accessible for new users and programmers!