These scripts explicitly use Bash, so we should be able to use
`[[` instead of `[` (which seems to be recommended).
Also added curly brackets to some bare variables, and quoted some paths.
This makes my IDE a bit more silent :-)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Originally I worked on this for the multi-stage build Dockerfile
changes. Decided to split this out as we are still waiting for
multi-stage to be available on CI and rebasing these is pretty annoying.
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
