👷 push dockerfile in dockerHub

.circleci/config.yml

@@ -72,3 +72,21 @@ jobs:
               echo "heroku app not responding, failing deploy" \
               exit 1; \
             fi
+  docker-build-and-push:
+    docker:
+      - image: docker:17.05.0-ce-git
+    steps:
+      - checkout
+      - setup_remote_docker
+      - run:
+          name: Build application Docker image
+          command: |
+            docker build --cache-from=app -t app .
+      - deploy:
+          name: Publish application to docker hub
+          command: |
+            docker login -e $DOCKER_HUB_EMAIL -u $DOCKER_HUB_USER_ID -p $DOCKER_HUB_PWD
+            docker tag app $DOCKER_HUB_USER_ID/devops-back-final:$CIRCLE_BUILD_NUM
+            docker tag app $DOCKER_HUB_USER_ID/devops-back-final:latest
+            docker push $DOCKER_HUB_USER_ID/devops-back-final:$CIRCLE_BUILD_NUM
+            docker push $DOCKER_HUB_USER_ID/devops-back-final:latest