Revert to proper container images

.gitlab-ci.yml

@@ -2,7 +2,7 @@ stages:
   - build
   - test
 
-build:
+buiild job:
   stage: build
   image: python:3-buster
   script:
@@ -14,20 +14,10 @@ build:
     - 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:
+test job:
   stage: test
-  needs: [build]
-  image: ${DOCKER_IMAGE_NAME_TAG_WITH_DIGEST}
-  before_script:
-    - echo "${DOCKER_IMAGE_NAME_TAG_WITH_DIGEST}"
+  image: python:3-buster
   script:
     - export PYTHONPATH=.
     - export FLASK_APP=period