[Snyk] Security upgrade node from 18.15-slim to hydrogen-bookworm-slim

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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:hydrogen-bookworm-slim, as this image has only 30 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
	793	Out-of-bounds Write SNYK-DEBIAN11-GLIBC-5927133	Proof of Concept
	793	Out-of-bounds Write SNYK-DEBIAN11-GLIBC-5927133	Proof of Concept
	614	Out-of-bounds Read SNYK-DEBIAN11-NCURSES-2767191	No Known Exploit
	621	HTTP Request Smuggling SNYK-UPSTREAM-NODE-5741793	Proof of Concept
	621	Improper Access Control SNYK-UPSTREAM-NODE-5843454	Proof of Concept

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