The previous setup scripts ran 'composer install' in a temporary container
before starting the actual containers. This caused vendor/ directory to be
created inside the temporary container and then deleted, leaving the host
filesystem without dependencies.
Changes:
- setup.bat: Move composer install to Step 4 (after containers start)
- setup.sh: Move composer install to Step 4 (after containers start)
- Use 'docker-compose exec' instead of 'docker-compose run --rm'
- This ensures vendor/ is written to the host filesystem via volume mount
- Added TEST_SETUP.md with comprehensive testing procedures
Now the vendor/ directory will persist correctly on Windows/WSL2 and the
app will load without 'vendor/autoload.php not found' errors.
This was the root cause of the setup not being truly '2-minute ready'.
