Automatically create mongo db on init

[RyanClementsHax]

Is there an existing issue that is already proposing this?

• I have searched the existing issues

Is your feature request related to a problem? Please describe it

mantis-app init assumes you have a db url ready. Many users of this cli won't have it ready or will cancel creation thinking mantis is too complicated.

Describe the solution you'd like

mantis-app init should give the user an option to choose how the database is created. It should be one of these options to start with:

• Use an in memory db (default)
• Provide a db url
• Create one using the atlas cli (if possible) https://www.mongodb.com/docs/atlas/cli/stable/atlas-cli-getting-started/
• Create one by manually installing on the user's machine (if practical) https://www.mongodb.com/docs/manual/installation/

Teachability, documentation, adoption, migration strategy

No response

What is the motivation / use case for changing the behavior?

A db is the only component that needs to be user provided during mantis-app init. Automating this will make the "init" experience seem "magical".