Add missing CI script file

.gitlab-ci.yml

+image: docker:latest
+
+services:
+  - docker:dind
+
+before_script:
+  # Add Docker-compose to Docker image
+  - apk add --no-cache py-pip
+  - pip install docker-compose==1.23.2
+  - docker info
+  - docker-compose --version
+
+stages:
+  - test
+  - build
+  - deploy
+
+# variables:
+#     HEROKU_API_KEY: //copy your heroku api key
+#     HEROKU_STAGING_APP: //copy your heroku staging app name here
+#     HEROKU_PRODUCTION_APP: //copy your production app name here
+#     POSTGRES_USER: postgres
+#     REGISTRY_NAME: registry.gitlab.com/your gitlab project's name
+#     CONTAINER_IMAGE: REGISTRY_NAME:$CI_BUILD_REF_NAME
+
+# Variables that are needed to be set on GitLab's settings
+# REGISTRY_USER : docker hub username
+# REGISTRY_PASSWORD : docker hub password
+# REGISTRY_REPO_NAME : docker hub repo name
+# DATABASE_URL_STAGING
+# DATABASE_URL_PRODUCTION
+# HEROKU_STAGING_APP
+# HEROKU_PRODUCTION_APP
+# HEROKU_API_KEY
+
+variables:
+  REGISTRY_NAME: $REGISTRY_USER/$REGISTRY_REPO_NAME
+  CONTAINER_IMAGE: $REGISTRY_USER/$REGISTRY_REPO_NAME:$CI_BUILD_REF_NAME
+
+test:
+  stage: test
+  script:
+    - echo "Starting tests"
+    - docker-compose run web sh -c "coverage run --include="./app/*" manage.py test"
+    - docker-compose run web sh -c "coverage report -m"
+
+build:
+  stage: build
+  script:
+    - echo "Building the app"
+    # uncomment below if using gitlab container registry
+    # - docker login -u gitlab-ci-token -p $CI_JOB_TOKEN registry.gitlab.com
+    - echo "$REGISTRY_PASSWORD" | docker login -u $REGISTRY_USER --password-stdin
+    - docker build -t $CONTAINER_IMAGE .
+    - docker push $CONTAINER_IMAGE
+
+deploy:
+  stage: deploy
+  only:
+    - staging
+    - master
+  script:
+    - echo "Deploying the app"
+    - >
+      if [[ "${CI_COMMIT_REF_NAME}" == "staging" ]];
+      then
+        DATABASE_URL=$DATABASE_URL_STAGING
+        HEROKU_APP=$HEROKU_STAGING_APP
+      elif [[ "${CI_COMMIT_REF_NAME}" == "master" ]];
+      then
+        DATABASE_URL=$DATABASE_URL_PRODUCTION
+        HEROKU_APP=$HEROKU_PRODUCTION_APP
+      fi
+    # uncomment below if using gitlab container registry
+    # - docker login -u gitlab-ci-token -p $CI_JOB_TOKEN registry.gitlab.com
+    - echo "$REGISTRY_PASSWORD" | docker login -u $REGISTRY_USER --password-stdin
+    - docker login --username=_ --password=$HEROKU_API_KEY registry.heroku.com
+    - docker pull $CONTAINER_IMAGE
+    - docker tag $CONTAINER_IMAGE registry.heroku.com/$HEROKU_APP/web
+    - docker-compose run -e DATABASE_URL=$DATABASE_URL deploy sh -c "python manage.py migrate"
+    - docker push registry.heroku.com/$HEROKU_APP/web
+    - docker run --rm -e HEROKU_API_KEY=$HEROKU_API_KEY wingrunr21/alpine-heroku-cli container:release web --app $HEROKU_APP