[Snyk] Security upgrade nginx from 1.23.3-alpine to 1.25.1-alpine

[Rachneet]

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

• docs/Dockerfile

We recommend upgrading to nginx:1.25.1-alpine, as this image has only 17 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	Cleartext Transmission of Sensitive Information SNYK-ALPINE317-CURL-3320725	No Known Exploit
	714	Out-of-bounds Write SNYK-ALPINE317-CURL-5958910	No Known Exploit
	714	Out-of-bounds Write SNYK-ALPINE317-CURL-5958910	No Known Exploit
	829	Out-of-bounds Write SNYK-ALPINE317-LIBWEBP-5902239	Mature
	829	Resource Exhaustion SNYK-ALPINE317-NGHTTP2-5954769	Mature

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