feat(database): use features

[dan-online]

Description

• Allows postgres/sqlite support to be enabled/disabled
• Adds delivery for postgres/sqlite specific images

Ref: #30

Type of change

Please delete options that are not relevant.

• Bug (non-breaking change which fixes an issue)
• Feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation (addition or change to documentation)