[Snyk] Security upgrade python from 3.10.7-alpine to 3.12.0a6-alpine

[snyk-bot]

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

• docker/backend/Dockerfile

We recommend upgrading to python:3.12.0a6-alpine, as this image has only 0 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
	471	Out-of-bounds Read SNYK-ALPINE316-E2FSPROGS-3339843	No Known Exploit
	400	Use After Free SNYK-ALPINE316-EXPAT-3062883	No Known Exploit
	400	Integer Overflow or Wraparound SNYK-ALPINE316-KRB5-3136432	No Known Exploit
	511	Use After Free SNYK-ALPINE316-OPENSSL-3314643	No Known Exploit
	511	Use After Free SNYK-ALPINE316-OPENSSL-3314643	No Known Exploit

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[sonarcloud[bot]]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[sonarcloud[bot]]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication