chore: update containers

[CjS77]

As part of updating launchpad to use stage- and main-net, we need to update the containers used, as well as bring configuratino up-to-date.

This PR is primarily focussed on updating the containers:

• use Github package repos instead of quay.io
• use stagenet instead of esme as default
• use ver 0.52 (this must change to stagenet-latest soon, but tags aren't up yet)

docs:

• Parsing the code, adding some helpful docs as I go.

behaviour changes:

• Config files are not deleted on startup. This is important. Users should be able to tweak settings between launches and have them persist.