maintain: update quickstart for selfhost with ui

[technovangelist]

Signed-off-by: Matthew Williams m@technovangelist.com

Summary

This updates the quickstart to use the new Helm file for user and grant, AND changes over to use the UI. We want this to be a QUICK start.

Checklist

• Wrote appropriate unit tests
• Considered security implications of the change
• Updated associated docs where necessary
• Updated associated configuration where necessary
• Change is backwards compatible if it needs to be (user can upgrade without manual steps?)
• Nothing sensitive logged
• Considered data migrations for smooth upgrades

Related Issues

Resolves #