test build docker

.circleci/config.yml

@@ -15,6 +15,12 @@ workflows:
       - doc:
           requires:
             - build
+      - docker_build:
+          requires:
+            - test
+            - lint
+            - e2e
+            - doc
 jobs:
   build:
     docker:
@@ -87,3 +93,17 @@ jobs:
           command: yarn doc:build
       - store_artifacts:
           path: ./doc-server
+  docker_build:
+    environment:
+            IMAGE_NAME: julienm1/my-awesome-ci-expr
+        docker:
+            - image: circleci/buildpack-deps:stretch
+        steps:
+            - checkout
+            - setup_remote_docker
+            - run: docker image build --tag $IMAGE_NAME:app .
+            - run: docker save -o image.tar $IMAGE_NAME
+            - persist_to_workspace:
+                root: .
+                paths:
+                    - ./image.tar