[Snyk] Security upgrade node from 16.13-alpine to 16.20-alpine

[thisguy726]

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:16.20-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
	621	HTTP Request Smuggling SNYK-UPSTREAM-NODE-3035795	Proof of Concept
	614	DNS Rebinding SNYK-UPSTREAM-NODE-3105822	No Known Exploit
	614	Insecure Permissions SNYK-UPSTREAM-NODE-3326666	No Known Exploit
	621	Use After Free SNYK-UPSTREAM-NODE-3326683	Proof of Concept
	614	Denial of Service (DoS) SNYK-UPSTREAM-NODE-3326688	No Known Exploit

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🦉 Denial of Service (DoS)

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