Fix dockerfile targetarch scope with docker

[OlivierCazade]

Tested locally with both podman and docker.

[codecov]

Codecov Report

Merging #128 (a75b2ea) into main (80337e1) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #128   +/-   ##
=======================================
  Coverage   41.32%   41.32%           
=======================================
  Files          31       31           
  Lines        2081     2081           
=======================================
  Hits          860      860           
  Misses       1183     1183           
  Partials       38       38           

Flag	Coverage Δ
unittests	41.32% <ø> (ø)

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[jpinsonneau]

Can't see the difference with my local versions but still works as expected 👍

Should we do that for all repos ?

[jotak]

/lgtm
/approve
thanks!

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: jotak

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