Update README

README.md

@@ -70,6 +70,30 @@ CMD gunicorn -b :$PORT mysite.wsgi
 
 4. Setup Gitlab CI
 
+```yaml
+image: docker:latest
+
+stages:
+  - build
+  - deploy
+
+services:
+  - docker:dind
+
+variables:
+  DOCKER_HOST: tcp://localhost:2375
+
+build:
+  stage: build
+  script:
+    - docker login -u "$CI_REGISTRY_USER" -p "$CI_REGISTRY_PASSWORD" $CI_REGISTRY
+    - docker build -t ${CI_REGISTRY}/${CI_PROJECT_NAME}/polls:${CI_COMMIT_SHORT_SHA} .
+    - docker tag ${CI_REGISTRY}/${CI_PROJECT_NAME}/polls:${CI_COMMIT_SHORT_SHA} ${CI_REGISTRY}/${CI_PROJECT_NAME}/polls:latest
+    - docker push -- ${CI_REGISTRY}/${CI_PROJECT_NAME}/polls
+  tags:
+    - k8s
+```
+
 5. Create manifest yaml file
     * PostgreSQL Server
         * Persistent Volume Claim