Make Contribution to the project more accessible. Fix issue #115

[jigglephysics23]

This PR makes the setup process for new contributors easy while not affecting current maintainers. Fix Issue #115

• Add Docker Compose dev configuration for local Postgres and Redis environments
• Add database creation and SSL detection in connection.ts
• Update .env.example with localhost connection strings for Docker containers
• Update README with Docker setup instructions for contributors
• Fix schema mismatches in schemas.ts (app_settings, notifications, sessions, tester_settings tables) (should reduce db errors for clean dbs.)

[dev-banane]

I'll fix the pr-source workflow real quick. If you want to have your features tested in the future, merge them into canary!

[jigglephysics23]

You would have to resync canary with main