ability to create dev/test deployments for a feature branch

[andrewm4894]

it would be very useful to be able to manually, or maybe via a GH action that can only be manually triggered, deploy a feature branch version of the app.

So for example to be easily able to get feedback or have people test a feature branch or PR some way to just deploy it to some dev env like:

https://web.pr-123545.open-assistant.io
https://web.pr-some-branch-name.open-assistant.io

not sure if this will just be too complex of prohibitively expensive but could be handy if it was possible.

[yk]

probably doable by instrumenting the ansible playbook a bit