Attempt to Reuse Build Container for Tests

.gitlab-ci.yml

@@ -14,10 +14,22 @@ buiild job:
     - pip3 install --upgrade setuptools
     - pip3 install Flask gunicorn pytest pytest-cov
     - pip3 install pendulum
+    - echo "DOCKER_IMAGE_NAME_TAG_WITH_DIGEST=${DOCKER_IMAGE_TAG_REF}@$(cat /digest-file)" > out.env
+    - cat out.env
+  artifacts:
+        reports:
+            dotenv: out.env
+
+
 
 test job:
   stage: test
-  image: python:3-buster
+  needs:
+        - build
+    image: ${DOCKER_IMAGE_NAME_TAG_WITH_DIGEST}
+    before_script:
+        # versions
+        - echo "${DOCKER_IMAGE_NAME_TAG_WITH_DIGEST}"
   script:
     - export PYTHONPATH=.
     - export FLASK_APP=period