Database - add as volume

[Romes8]

Currently we have a database included in our Docker container. If we delete this all the data are gone.

TODO:

• we need to mount database as a volume to our container to persist the data.

[danielgron]

Subissue: #124 Use envvars for DB path so we have flexibility to mount docker volumes with envvar SQLITEPATH and not a hardcoded path