Allow both preview and live context ID in single app

[nevnet]

Description

It would be great if Next.js 'draft mode' could be used to its full potential by allowing the SDK to switch between using a preview context ID and a live context ID depending on the mode. This would allow a single app in Vercel to serve as both an editing host and a live host. When draft mode is enabled, SSG should be disabled and the preview ID should be used.

Sure, I could probably hack this into our current code, but I can't be 100% sure what the content SDK is doing with the context ID at runtime so I can't know how all dependent systems might behave.

Request is for this to either be a core feature of the SDK (e.g. environment vars can contain both IDs) or for it to at least be a supported configuration with some guidance on implementing it in our own projects.

The result would be a huge reduction in Vercel project/site/pipeline configuration for projects that use external editing hosts.

Additional information

No response