[Snyk] Security upgrade nginx from 1.23 to 1.25.2

[lcahlander]

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

• nginx/Dockerfile

We recommend upgrading to nginx:1.25.2, as this image has only 73 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
	793	Out-of-bounds Write SNYK-DEBIAN11-GLIBC-5927133	No Known Exploit
	844	Out-of-bounds Write SNYK-DEBIAN11-LIBWEBP-5893094	Mature
	686	Out-of-bounds Write SNYK-DEBIAN11-LIBWEBP-5918870	No Known Exploit
	686	Integer Overflow or Wraparound SNYK-DEBIAN11-LIBX11-5927150	No Known Exploit
	733	Resource Exhaustion SNYK-DEBIAN11-NGHTTP2-5953384	Mature

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