[Snyk] Security upgrade nginx from alpine to 1.25.3-alpine3.18

[mardiros]

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

• examples/consul_template_sd/router/Dockerfile

We recommend upgrading to nginx:1.25.3-alpine3.18, 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	Issue	Exploit Maturity
	Missing Encryption of Sensitive Data SNYK-ALPINE318-CURL-6104720	No Known Exploit
	Missing Encryption of Sensitive Data SNYK-ALPINE318-CURL-6104720	No Known Exploit
	CVE-2023-46218 SNYK-ALPINE318-CURL-6104721	No Known Exploit
	CVE-2023-46218 SNYK-ALPINE318-CURL-6104721	No Known Exploit

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (a7ba5c7) 100.00% compared to head (507e987) 100.00%.

Additional details and impacted files

@@            Coverage Diff            @@
##              main       #93   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           47        47           
  Lines         1605      1605           
=========================================
  Hits          1605      1605           

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