[Snyk] Security upgrade golang from 1.20.1 to 1.21.1

[DvirDukhan]

This PR was automatically created by Snyk using the credentials of a real user.

Keeping your Docker base image up-to-date means you’ll benefit from security fixes in the latest version of your chosen image.

Changes included in this PR

• Dockerfile

We recommend upgrading to golang:1.21.1, as this image has only 78 known vulnerabilities. To do this, merge this pull request, then verify your application still works as expected.

Some of the most important vulnerabilities in your base image include:

Severity	Priority Score / 1000	Issue	Exploit Maturity
	714	Integer Overflow or Wraparound SNYK-DEBIAN11-APR-3261105	No Known Exploit
	686	Out-of-bounds Write SNYK-DEBIAN11-GLIBC-5927133	No Known Exploit
	686	Out-of-bounds Write SNYK-DEBIAN11-GLIBC-5927133	No Known Exploit
	686	Out-of-bounds Write SNYK-DEBIAN11-GLIBC-5927133	No Known Exploit
	686	Out-of-bounds Write SNYK-DEBIAN11-GLIBC-5927133	No Known Exploit

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[codecov]

Codecov Report

All modified lines are covered by tests ✅

Comparison is base (9578098) 82.74% compared to head (d380271) 82.74%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #168   +/-   ##
=======================================
  Coverage   82.74%   82.74%           
=======================================
  Files           7        7           
  Lines         591      591           
=======================================
  Hits          489      489           
  Misses         59       59           
  Partials       43       43           

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