[Snyk] Security upgrade python from 3.7.12 to 3.11.5

[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

• app/Dockerfile

We recommend upgrading to python:3.11.5, as this image has only 172 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	Out-of-bounds Write SNYK-DEBIAN11-FREETYPE-2774656	No Known Exploit
	844	Out-of-bounds Write SNYK-DEBIAN11-LIBWEBP-5893094	Mature
	844	Out-of-bounds Write SNYK-DEBIAN11-LIBWEBP-5893094	Mature
	844	Out-of-bounds Write SNYK-DEBIAN11-LIBWEBP-5893094	Mature
	844	Out-of-bounds Write SNYK-DEBIAN11-LIBWEBP-5893094	Mature

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