[Snyk] Security upgrade node from lts-alpine to 20-alpine3.18

[gaurav-nelson]

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

• Dockerfile

We recommend upgrading to node:20-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	Priority Score / 1000	Issue	Exploit Maturity
	300	Improper Authentication SNYK-ALPINE318-OPENSSL-5776808	No Known Exploit
	371	Inefficient Regular Expression Complexity SNYK-ALPINE318-OPENSSL-5788370	No Known Exploit
	371	Inefficient Regular Expression Complexity SNYK-ALPINE318-OPENSSL-5788370	No Known Exploit
	371	Excessive Iteration SNYK-ALPINE318-OPENSSL-5821142	No Known Exploit
	371	Excessive Iteration SNYK-ALPINE318-OPENSSL-5821142	No Known Exploit

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