👷 Add coverage with Smokeshow to CI and badge (#638)

Co-authored-by: Sebastián Ramírez <tiangolo@gmail.com>

.github/workflows/test.yml

@@ -29,6 +29,23 @@ jobs:
       - name: Docker Compose up
         run: docker compose up -d
       - name: Docker Compose run tests
-        run: docker compose exec -T backend bash /app/tests-start.sh
+        run: docker compose exec -T backend bash /app/tests-start.sh "Coverage for ${{ github.sha }}"
       - name: Docker Compose cleanup
         run: docker compose down -v --remove-orphans
+      - name: Store coverage files
+        uses: actions/upload-artifact@v3
+        with:
+          name: coverage-html
+          path: backend/htmlcov
+
+  # https://github.com/marketplace/actions/alls-green#why
+  alls-green:  # This job does nothing and is only used for the branch protection
+    if: always()
+    needs:
+      - test
+    runs-on: ubuntu-latest
+    steps:
+      - name: Decide whether the needed jobs succeeded or failed
+        uses: re-actors/alls-green@release/v1
+        with:
+          jobs: ${{ toJSON(needs) }}