Fixes scripts and removes shellcheck warning suppressions.
* regexp warnings
* use ./*glob* so names don't become options
* use $(..) instead of legacy `..`
* read with -r to avoid mangling backslashes
* double quote to prevent globbing and word splitting
o Set -e to abort script if a command fails.
o Allow custom docker 'TAG' from the environment.
o Move arch suffix to version to allow all images to
be put into a single repository.
o Enable cross builds. When doing cross builds where the
host and target architectures are different 'RUN mkdir'
will fail since the target container cannot be run on
the host. To work around this, create the directories
in build-docker, then use ADD in the Dockerfile.
o Add Dockerfile-release.arm64
Signed-off-by: Geoff Levand <geoff@infradead.org>
The docker build command will use whatever directory contains the
Dockerfile as the build context (including all of its subdirectories).
And the <src> path of ADD must be inside the context of the build.
So change it to build in a specific directory for clean and fast.
Vimal K