Deprecate some old configuration files, update readme to reflect docker use changes

[vevetron]

Description

Removes deprecated files.

Updates readme to reflect how docker-compose is a part of docker now.

Resolves #3533

Type of change

• [x] Bug fix (non-breaking change which fixes an issue)
• [x] Documentation

How has this been tested?

1. Deleted all relevant data files
2. Deleted all airtable docker images
3. Re-ran docker-compose up - everything ran fine.

Post-merge follow-ups

• [x] No action required
• [ ] Actions required (specified below)