Delete old workflow file and disable building binaries on pull requests, as we already have CI for that

Use Debian base image for all steps of the build process

Improve Github Actions Workflow

Minor typo conect -> connect

apt is intended for humans, not scripts.

--no-install-recommends improves build time by avoiding to install
unneeded packages.

Checked with:

```Shell
find . -type f -print0 | xargs -0 pcregrep -M '\n\n\n'
```

Ref: https://github.com/moby/moby/issues/4032
Ref: https://sweetcode.io/using-docker-reproducible-build-environments/
Ref: https://github.com/hashbang/aosp-build/blob/master/config/container/Dockerfile

Note from @dani-garcia:

> I don't think this is doing anything right now because the target is probably
> installed already.

The muslrust images seem to have a workdir of /volume as opposed to / in the
others so doing cargo new like this would create the folder in /volume/app.

Thanks to @dani-garcia for the review!

Avoid some to_string in the request logging and include message to disable web vault when not found.

No need to use two different base images. Debian buster is pulled later
anyway so we can just use it for the vault stage as well.

My reason for this change is partly to avoid redundancy and partly to
make it easier to build everything yourself. When all the build
environment is based on Debian than you just have to figure out how to
build a Debian Docker base image (ref:
https://github.com/ypid/docker-makefile).

Add Github build Action