[Snyk] Security upgrade nginx from 1.23.0-alpine to 1.25.3-alpine

[slapshin]

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

• docker/Dockerfile

We recommend upgrading to nginx:1.25.3-alpine, as this image has only 0 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	Exposure of Resource to Wrong Sphere SNYK-ALPINE316-CURL-3063711	No Known Exploit
	817	Heap-based Buffer Overflow SNYK-ALPINE316-CURL-5958908	Proof of Concept
	817	Heap-based Buffer Overflow SNYK-ALPINE316-CURL-5958908	Proof of Concept
	829	Out-of-bounds Write SNYK-ALPINE316-LIBWEBP-5902237	Mature
	714	Out-of-bounds Write SNYK-ALPINE316-ZLIB-2976176	No Known Exploit

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