Provide Deployment Integrations for Other Platforms Supported by Datasette

[gkapfham]

Right now Chasten provides integrations for the Fly and Vercel platforms.
However, it is also possible to deploy a Datasette to other platforms like
Heroku. We should also investigate whether other platforms besides Heroku are
also available and then determine whether or not Chasten should provide
deployment command-line arguments/options for these other platforms.

[gkapfham]

I suggest that we defer the implementation of this issue until after week 16. Is that acceptable to everyone?