Congrats on the launch, and you have an outstanding MVP here. I think it is priced well, considering that I would normally run something similar on a $5/month server for file syncing.
I'm a compulsive note-taker and frequent writer, so this is something I will personally be taking advantage of. The blogging feature is interesting, but I'm actually going to experiment with using it to replace my current use of Notes on iOS/Mac and Typora.
I'm curious if your development path includes Desktop. I've been between Ulysses and Typora for years now. Neither covers the entirety of my file syncing, desire to access from a browser or cross platform needs.
I really think you're on to something here. Best of luck!