-> use bullseye and install python2.7
Travis-ci is long gone, now we have github actions. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
some files or directories (like .gitignore or .git) makes no sense to copy to the docker image Signed-off-by: Mustafa Yücel <mustafa.yuecel@siemens.com>