[Snyk] Security upgrade python from 3.7 to 3.11-rc-slim-bullseye

[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

• Dockerfile

We recommend upgrading to python:3.11-rc-slim-bullseye, as this image has only 50 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
	500	Out-of-Bounds SNYK-DEBIAN11-MARIADB105-2940556	No Known Exploit
	500	Out-of-Bounds SNYK-DEBIAN11-MARIADB105-2940556	No Known Exploit
	500	Out-of-Bounds SNYK-DEBIAN11-MARIADB105-2940588	No Known Exploit
	500	Out-of-Bounds SNYK-DEBIAN11-MARIADB105-2940588	No Known Exploit
	500	Out-of-Bounds SNYK-DEBIAN11-MARIADB105-2940588	No Known Exploit

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