The `makefile()` utility was used to create a temporary Dockerfile, and after
tests completed, this file was deleted.
However, the _build_ used the current path (`/usr/local/bin/docker`) as
build-context. As a result, roughtly 20 MB was sent as build-context for each
build, but none of the builds actually required a build-context.
This patch;
- creates a temp-dir for the test, which can be used as build-context
- changes the `makefile()` utility and removes the `cleanup` functionality
- instead, the `temp-dir` is removed after the test finishes (which also removes the temporary `Dockerfile`)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Upstream-commit: ebe66b1d0f52dc58a98a428d4efa4d2f2743b96e
Component: engine
f3ddace468