feat: add extraEnvFrom to db-migrate and db-initialize

Closes #265

See merge request !376



Merged-by: João Alexandre Cunha <j.a.cunha@gmail.com>
Approved-by: Taka Nishida <tnishida@gitlab.com>
Approved-by: João Alexandre Cunha <j.a.cunha@gmail.com>
Reviewed-by: João Alexandre Cunha <j.a.cunha@gmail.com>
Co-authored-by: Alexander Rusa <alex@rusa.at>