[Snyk] Security upgrade nginx from 1.21.4-alpine to 1.25.4-alpine

[tugdualnicolas]

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-docker/Dockerfile

We recommend upgrading to nginx:1.25.4-alpine, as this image has only 1 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	Incorrect Default Permissions SNYK-ALPINE314-CURL-2938017	No Known Exploit
	714	Incorrect Default Permissions SNYK-ALPINE314-CURL-2938017	No Known Exploit
	714	Cleartext Transmission of Sensitive Information SNYK-ALPINE314-CURL-3320728	No Known Exploit
	714	Out-of-bounds Write SNYK-ALPINE314-FREETYPE-2809178	No Known Exploit
	714	Out-of-bounds Write SNYK-ALPINE314-ZLIB-2976174	No Known Exploit

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🦉 Incorrect Default Permissions