However I've been doing something very similar for over a year now. Its called a Developer Diary. I can't give credit for the talk that gave me this idea but it's without doubt one of the best changes I've made to further myself.
It's the same idea, except the content is not public. I've toyed with the idea but the content is very rough plus includes some very specific details. That said I host the content so it's always in my browser as plain text files, so able to search and navigate easily. I've blogged about the idea before, but however you do it, make notes. Your future self will thank you.