[Snyk] Security upgrade node from 16.12.0-alpine to 16.16.0-alpine

[snyk-bot]

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:16.16.0-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
	400	Loop with Unreachable Exit Condition ('Infinite Loop') SNYK-ALPINE313-OPENSSL-2426334	No Known Exploit
	400	Inadequate Encryption Strength SNYK-ALPINE313-OPENSSL-2941811	No Known Exploit
	400	Inadequate Encryption Strength SNYK-ALPINE313-OPENSSL-2941811	No Known Exploit
	400	Out-of-bounds Write SNYK-ALPINE313-ZLIB-2434418	No Known Exploit
	571	Out-of-bounds Write SNYK-ALPINE313-ZLIB-2976175	No Known Exploit

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