Since the application does not use a database, it's confusing to have to
set a bogus database URL environment variable. This change follows [the
Lucky guide][1] suggestion for disabling the need for database
configuration. That makes the setup a little easier.
[1]:
https://www.luckyframework.org/guides/database/intro-to-avram-and-orms
This is an experiment to see if it forces me to actually have updated
the version before I build. The idea is that I need to actually commit
the version which will make it more likely that all instances can pull
down the code and display the correct version if I've done it myself.
It uses `git show` to grab the committed contents of src/version then
checks to see if it matches today's date.
