Add Dockerfile, gitlab-ci

manifest.yaml

@@ -100,9 +100,6 @@ template:
     containers:
     name: polls-app
         image: $CI_REGISTRY_IMAGE/$CI_COMMIT_REF_NAME/polls:${CI_COMMIT_SHORT_SHA}
-        # This setting makes nodes pull the docker image every time before
-        # starting the pod. This is useful when debugging, but should be turned
-        # off in production.
         imagePullPolicy: Always
         env:
             - name: DATABASE_NAME