Add documentation page for using SvelteKit with Docker and Docker Compose

Describe the problem

I've seen users (including myself) who want to deploy SvelteKit applications with Docker and Docker Compose, but there is currently no official documentation explaining how to do this. This can lead to confusion regarding best practices for containerizing SvelteKit apps, handling environment variables, and orchestrating multiple services.

Describe the proposed solution

Add a dedicated documentation page that explains how to use SvelteKit with Docker and Docker Compose. The page should include example Dockerfiles, a sample docker-compose.yml, tips for production deployment, and any SvelteKit-specific advice such as environment variables and static asset handling.

Alternatives considered

Alternatives include searching for community tutorials or piecing together information from multiple sources like Reddit, but these may be incomplete or out of date.

Importance

would make my life easier

Additional Information

No response

Review the existing SvelteKit documentation structure first and identify the appropriate entry point for a Docker page. Check current Docker and Docker Compose guidance, then ensure the finished page covers the requested examples, environment variables, production deployment, and static asset handling.