[Snyk] Security upgrade php from 7.2-alpine to 7.4.33-alpine

[mgulter]

Snyk has created this PR to fix 4 vulnerabilities in the dockerfile dependencies of this project.

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

Snyk changed the following file(s):

• Dockerfile

We recommend upgrading to php:7.4.33-alpine, as this image has only 36 known vulnerabilities. To do this, merge this pull request, then verify your application still works as expected.

Vulnerabilities that will be fixed with an upgrade:

	Issue	Score
	Out-of-bounds Read SNYK-ALPINE312-APKTOOLS-1533753	714
	Double Free SNYK-ALPINE312-CURL-1585256	714
	Buffer Overflow SNYK-ALPINE312-OPENSSL-1569452	714
	Buffer Overflow SNYK-ALPINE312-OPENSSL-1569452	714
	Out-of-bounds Write SNYK-ALPINE312-ZLIB-2977082	714

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• Check the changes in this PR to ensure they won't cause issues with your project.
• Max score is 1000. Note that the real score may have changed since the PR was raised.
• This PR was automatically created by Snyk using the credentials of a real user.

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