Add CI workflow to test spinning up docker compose

[Mark90]

Add a github actions workflow to spin up docker compose and perform some checks on the services.

This should make it easier to detect that a PR will leave the repository in a broken state.

3. Health Checks
   If your services have health checks defined, you can wait for them to become healthy.
   Example GitHub Actions Step:

name: Start services and wait for health
  run: |
    docker compose up -d
    docker compose ps --services | xargs -I {} sh -c 'docker inspect --format "{{.State.Health.Status}}" {}_1 | grep -q healthy || exit 1'

4. Integration Testing
   You can run tests against your running services. For example, if you have a web service, you can use curl or a testing tool like pytest to verify endpoints.
   Example GitHub Actions Step:

name: Run integration tests
  run: |
    docker compose up -d
    # Example: Test if a web service is reachable
    curl --retry 5 --retry-delay 5 --retry-connrefused http://localhost:8080/health