feat: Add health endpoints to Mos- & Playout-Gateway

[nytamin]

About the Contributor

This pull request is posted on behalf of the NRK

Type of Contribution

This is a: Feature

New Behavior

This PR adds an opt-in (using CLI arg -healthPort) http-server to Mos- & Playout-Gateway, which exposes the /healthz and /readyz endpoints, which can be used in a Kubernetes envidonment to determine liveness and readyness, see https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes.

Affected areas

This PR affects no playout, nor ingest logic, but adds an opt-in http server to mos-gateway & playout-gateway

Time Frame

Not urgent, but we would like to get this merged into the in-development release.

Other Information

Status

• PR is ready to be reviewed.
• The functionality has been tested by the author.
• Relevant unit tests has been added / updated.
• Relevant documentation (code comments, system documentation) has been added / updated.

[codecov-commenter]

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Codecov Report

❌ Patch coverage is 34.93976% with 54 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
packages/server-core-integration/src/lib/health.ts	22.85%	54 Missing ⚠️

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