feat: enable multiarch build

[nohant]

Hello!

by adding the architecture in the GOARCH variable it should be compile faster and work better for the #71

I didn't update the version of the various actions because maybe there is a motive for them to be that specific and I don't know.

Locally i tried TARGETPLATFORM and TARGETARCH

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 31.64%. Comparing base (55429ee) to head (8802851).

Additional details and impacted files

@@           Coverage Diff           @@
##           master      #88   +/-   ##
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  Coverage   31.64%   31.64%           
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  Files          22       22           
  Lines        1640     1640           
=======================================
  Hits          519      519           
  Misses       1070     1070           
  Partials       51       51           

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[tonyo]

Thanks for the suggestion.

Doesn't seem to work in its current form (fails with unsupported GOOS/GOARCH pair linux/linux/amd64 when testing locally), but might work with TARGETARCH.

[nohant]

yep I was undecided to which use of the two, better if it works with ARCH

[tonyo]

Looks like ARG is not needed; also added TARGETPLATFORM, should be good now.

[nohant]

super good work, thank you mate