Resolve "Docker scripts does not support sqlite database"

name: Hotfix
about: Quick bugfix with very localized and low impact changes.

Closes #57

Description

Add instructions in run_app.sh for supporting db initialization and access.

Changelog

Please summarize the change in one line to generate the changelog: E.g.

• Add possibility to mount the database in docker scripts (#57)

How to test

• Use scripts for building and running docker container
• Verify logs of the running container (no backend errors)
• Verify that logging with superdsi account works on the site