Build manifest

[pi0]

When building Nitro-based projects, we can gather information about build/deployment and make it universally accessible with a unified API across deployment providers.

• manifest.buildId: Auto-generated during the build
• manifest.deploymentId: Can be set by the deployment provider (usually env variables)
• manifest.timestampt: Time when the build started

It can be accessible in different contexts:

• Via build-context using nitro.options.manifest.{buildId, deploymentId}
• Via runtime config (useRuntimeConfig().nitro.manifest)
• Via server build manifest file (.output/nitro.json)
• Via an opt-in/customizable public manifest (.output/public/_nitro/builds/{buildId}.json) similar to Nuxt app manifest

It can be used for several purposes both for custom deployments but mainly for gracefully handling new deployments or provider-specific logic like vercel skew protection