💚 add docker job

.circleci/config.yml

@@ -116,6 +116,27 @@ jobs:
       - run:
           name: Heroku Deploy
           command: git push https://heroku:$HEROKU_API_KEY@git.heroku.com/$HEROKU_APP_NAME.git main
+  docker-build-and-push:
+    working_directory: /dockerapp
+    docker:
+      - image: docker:17.05.0-ce-git
+    steps:
+      - checkout
+      - setup_remote_docker
+      - run:
+          name: build app  for docker
+          command: |
+            docker build --cache-from=app -t app .
+      - deploy:
+          name: we publish the app on my docker hub
+          environment:
+            CIRCLE_BUILD_NUM: 1
+          command: |
+            docker login -e $DOCKER_HUB_EMAIL -u $DOCKER_HUB_USER_ID -p $DOCKER_HUB_PWD
+            docker tag app $DOCKER_HUB_USER_ID/backend_final:$CIRCLE_BUILD_NUM
+            docker tag app $DOCKER_HUB_USER_ID/backend_final:latest
+            docker push $DOCKER_HUB_USER_ID/backend_final:$CIRCLE_BUILD_NUM
+            docker push $DOCKER_HUB_USER_ID/backend_final:latest
 workflows:
   version: 2
   build-back-deploy: