docs: Mi/2961/docker compose (#3027)

* Interim commit

* Added and rearranged sections

* Link to environment variables page

* docs:  updates per PR feedback

* docs: mi/2961/docker-compose

- Matched Nginx file names
- Moved Docker Engine and Compose install to prerequisites section
- checked in webhook-events.mdx from main

* docs: mi/2961/docker-compose

- Matched Nginx file names
- Lumped Docker Engine and Compose install with VM deployment as prerequisite steps
- Checked in webhook-events.mdx from main

* docs: mi/2961/docker-compose

Fixed formatting issues and typos

* docs: mi/2961/docker-compose

Addressed NGIX file formatting issues.

* docs: 2961/docker-compose

Co-authored-by: Max Kurapov <max@interledger.org>

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Co-authored-by: Max Kurapov <max@interledger.org>

Author: hajjimo