BusyBox `adduser` was reading config from `/etc` that unnecessarily populates the home folder with various dot files.
Alternative approach is to create the user and home folder manually. This avoids some extra files like the `-` suffixed backup copies from `adduser`.
Create `testssl` user (_and group_) with no password (`-D`) and default their shell to bash (`-s`):
- A group will implicitly be created with the same value as the user. `addgroup testssl` and `-G testssl` are not needed.
- Gecos data (`-g "testssl user"`) doesn't appear relevant to the project to be required? The default gecos value (`Linux User,,,`) should be fine.
xxd is not a strict requirement and a fallback logic exists to handle its absence. However it is in general more performant and helpful in debugging as well which is desirable in many situations like ci/cd pipelines. See commit 3756cdc for details
This is a small cleanup of find_openssl_binary(). It tries also
to find a newer openssl version which we could need for any
new features. As stated in the comment at some point we should
decide whether we stick with our old version or rather supply
a new one. (xmpp-server is also not builtin for our 1.0.2) or
maybe find a good way (code) how to use both.
Also it looks for socat and if found it populates the according
global var.
It does a minor resort of global vars in the beginning.
.. see also #1559.
It "mkdirs" the needed etc and bin directories first, then copies
stuff over. It also reduces a few layers.
Also it corrects a mistake in the Readme.md (docker exec --> run)
Thanks for the discussion @Alex131089
