Store test results as artifacts

Adjust the test commands to store the test results as XML, which are
then stored as test results.

.circleci/config.yml

@@ -60,7 +60,19 @@ jobs:
 
       - run:
           name: Test Code
-          command: docker run --entrypoint "/app/.local/bin/coverage" fx-private-relay run --source=. -m pytest --cov=./ --cov-fail-under=60
+          command: |
+            docker create -v /tmp/test-results --name test-results alpine /bin/true
+            docker run test-results /bin/sh -c "chmod 0777 /tmp/test-results && chown 10001:10001 /tmp/test-results"
+            docker run \
+              --entrypoint "/bin/bash" \
+              --volumes-from test-results \
+              fx-private-relay \
+              -c \
+              'mkdir -p /tmp/test-results/pytest && mkdir -p /tmp/test-results/coverage && /app/.local/bin/coverage run --source=. --branch -m pytest --cov=./ --cov-fail-under=60 --junitxml=/tmp/test-results/pytest/results.xml && /app/.local/bin/coverage xml -o /tmp/test-results/coverage/results.xml'
+            docker cp test-results:/tmp/test-results /tmp
+
+      - store_test_results:
+          path: /tmp/test-results
 
   deploy:
     docker: