On running make validate-git
On my local mac cloned from the main brunch
Seems the default for the variable at "docker-bake.hcl"
COMMIT_RANGE = ""
Is causing the make command to exit with error:
COMMIT_RANGE required
This is set with correct values in the git actions process, and pass.
But should also be executed and pass in local env.

Solution:
updating the default in the docker-"bake.hcl" file as naive value of `HEAD..HEAD`
and overriding it with local env values from the "Makefile".

in addition adding the "coverage.txt" file to the git ignore so it will not get checked in.

Signed-off-by: alik42 <alik.rogotner@gmail.com>

…nvironmnt

Signed-off-by: Alik <120061088+alik42@users.noreply.github.com>