Really interesting project/product! It's really nice to see new ways of rendering OSM data, and alternative map services.
I am developing another way to run your own map server (without mapnik!) from a low-end computer (https://github.com/jamesrr39/ownmap-app in case you're interested), but a little bit different to you in that I'm currently focusing on rendering raster tiles. I'm really happy I saw this thread, however, I hadn't heard of the OSM Express, MBTiles or PMTiles formats before and was/am rolling my own format, so it's really interesting looking at some ideas from these.
I am developing another way to run your own map server (without mapnik!) from a low-end computer (https://github.com/jamesrr39/ownmap-app in case you're interested), but a little bit different to you in that I'm currently focusing on rendering raster tiles. I'm really happy I saw this thread, however, I hadn't heard of the OSM Express, MBTiles or PMTiles formats before and was/am rolling my own format, so it's really interesting looking at some ideas from these.
Thanks again for sharing your project!