Send coverage to Coveralls

When updating CI we missed this step. We are not sure anyone actually
uses the Coveralls data, but we where sending it so should continue to.

To get the report, we copy out of the container.

.github/workflows/ci_checks.yml

@@ -55,6 +55,16 @@ jobs:
         run: |
           docker compose -p app_test -f docker-compose.ci.yml \
             run --name app_test test /bin/bash -c "bin/rspec --format=documentation"
+      -
+        name: Copy coverage report from container
+        run:
+          docker cp app_test:/srv/app/coverage/lcov.info coverage/lcov.info
       -
         name: Shutdown containers
         run: docker compose -p app_test down && docker compose -p app_test rm
+      -
+        name: Send coverage report to Coveralls
+        uses: coverallsapp/github-action@v2
+        with:
+          file: ./coverage/lcov.info
+          fail-on-error: false