Minor bug fixes

This release fixes a few bugs caused by the recent upgrade.

Python, docker, and database updates

This release updates the python version to 3.8 (along with upgrading various dependencies), switches the default backend to PostgreSQL, and builds the docker image on Alpine Linux, to drastically reduce image size.

First versioned release

This is the initial release of plantagenet, a python blogging system.
https://github.com/izrik/plantagenet