DB bootstrap

[c0c0n3]

Describe the bug
In principle Anubis can create and populate its own DB that automatically. But I hit a snag when I was developing the cloud deployment

• https://github.com/c0c0n3/anubis.deployment/blob/anubis-take2/k8s/apps/policy-api/create-db-issue.md

Let's check that and possibly plan for a semi-automated deployment where we manually create a basic DB (even better if we whip together a SQL script) and then let Anubis populate it with its own tables as it'd normally do.

To Reproduce
See document linked above.

Expected behavior
Given a Postgres user with create DB perms, Anubis should be able to create its own DB in a cloud deployment---i.e. when running inside a K8s pod.