CI improvements

[jondot]

once #716 is done, we can do "unattended" various-options generation of starter apps, including different database options and background worker options, all through CLI flags.

This is the outline of improvements we can have after it is done:

• implement a windows ci end to end without containers, generating app and migration by selecting: async, sqlite (by this, creating a 0 dependencies, no containers set up) #715
• set all defaults to not require any containers.
• add CI for "containerless" and "with containers" which is: pg + redis vs sqlite + async
• we can now troubleshoot #714
• modify documentation: the default app for development is now async and sqlite. how do we move to a real set up with postgres and redis as queue
• THINK: can we remove some starters now that we have building with options?