setup docker environment for circleci CI/CD pipeline test

Author: Helene

.circleci/config.yml

@@ -24,6 +24,9 @@ jobs:
             . venv/bin/activate
             flake8 --max-line-length=999 --ignore=E731,E741,E712,E722 --exclude=venv* --statistics
             nosetests tests/
+      - setup_remote_docker:
+          version: 19.03.13
+          docker_layer_caching: true
       - run:
           name: Build Docker image
           command: |