[Docs]: Move multicontainer docs to community and add redirect in docs

## Problem Statement

Move multicontainer docs to community and add redirect in docs

## Other Relevant URLs

Draft: https://www.notion.so/Move-multicontainer-docs-to-community-and-add-redirect-in-docs-143fe271b0e28097b3d9ca1e8573cc65
Slack/conversation:

Start with the linked Notion draft and locate the existing multicontainer documentation in this repository. Done means the multicontainer docs are moved to the community location and a redirect is added in the docs.

Written by the indexing model from the issue text.