Store mysql db on local filestore so it surves restarts of the mysql container

[epugh]

Noticed on chorus.dev.o19s.com, mysql died... did a docker-compose start mysql, and we ened up with a new databas setup and no "quepid" database!

curl http://chorus.dev.o19s.com/healthcheck produced

curl "http://chorus.dev.o19s.com:3000/healthcheck"
{"code":503,"errors":[{"name":"database","exception":"ActiveRecord::NoDatabaseError","message":"Unknown database 'quepid'"},{"name":"migrations","exception":"ActiveRecord::NoDatabaseError","message":"Unknown database 'quepid'"}]}%