@fabio I really, really love it!! I wanted to do the same for quite a long time - but I didn't; and now maybe I can eventually steal your code and RIIR in glorious AGPL!
That said, unfortunately at the moment it's not working for me, I can't open it either in my client, or through my instance's search 
FWIW, through my instance I'm seeing some "503 Remote SSL certificate could not be verified", while the client just spins a throbber endlessly. No idea where the fault lies, but I do remember reading many times that Mastodon is a flustercluck and a fishy citizen in ActivityPub 
...
Anyway, huge applause from me regardless, and hopefully one day I can get to fave the actual post on the blog!