Update deployment documentation.

[leerob]

This PR adds new information to the Next.js deployment documentation to highlight examples or guides for deploying Next.js to a handful of services. This builds on the existing documentation around the Next.js Build API (from next build) and options for self-hosting with Node.js or Docker.

Feature

• Implements an existing feature request or RFC. Make sure the feature request has been accepted for implementation before opening a PR.
• Related issues linked using fixes #number
• Integration tests added
• Documentation added
• Telemetry added. In case of a feature if it's used or not.
• Errors have helpful link attached, see contributing.md

Documentation / Examples

• Make sure the linting passes by running pnpm lint
• The examples guidelines are followed from our contributing doc