9.7Trap for Cleanup

Ensure cleanup runs even if the script crashes:

#!/bin/bash
set -euo pipefail

cleanup() {
    echo "Cleaning up..."
    kill $SERVER_PID 2>/dev/null || true
    docker compose down 2>/dev/null || true
}

# Register cleanup to run on EXIT, regardless of how the script ends
trap cleanup EXIT

# Now start things up — cleanup is guaranteed to run
docker compose up -d
SERVER_PID=$!
pytest tests/