Simple Auth used to provide auth over HTTP. The original motivation
behind this was this was a simple way to add Cloudron Auth integration.
Back in the day, Cloudron Auth was a requirement for apps but this is
not the case anymore.
This is currently not used by any app and having this might encourage
people to make Cloudron specific un-upstreamable changes.
The core issue we want to solve is to debug a running app.
Let's make it explicit that it is in debugging mode because
functions like update/backup/restore don't work.
Part of #171
When turned off, it will put the app in a writable rootfs. This
allows us to debug live/production apps (like change start.sh) and
just get them up and running. Once turned off, this app cannot be
updated anymore (unless the force flag is set). This way we can
then update it using the CLI if we are convinced that the upcoming
update fixes the problem.
Part of #171
