change type

.gitlab-ci.yml

 variables:
   HEROKU_APP_NAME: tdt4242-base
+  HEROKU_REGISTRY_IMAGE: registry.heroku.com/${HEROKU_APP_NAME}/web
 
-image: python:3
 test:
+  image: python:3
   script:
   # this configures Django application to use attached postgres database that is run on `postgres` host
     - cd backend/secfit
@@ -10,22 +11,24 @@ test:
     - pip install -r requirements.txt
     - python manage.py test
 
-staging:
-  stage: staging
-  script:
-    - echo “Deploying the app”
-    - pip install docker-compose
-    - docker-compose build
-    - docker-compose up -d
+image: docker:stable
+services:
+  - docker:dind
 
+stages:
+  - build_and_deploy
 
-development:
-  type: deploy
-  image: ruby
+build_and_deploy:
+  stage: build_and_deploy
   script:
-      - apt-get update -qy
-      - apt-get install -y ruby-dev
-      - gem install dpl
-      - dpl --provider=heroku --app=$HEROKU_APP_NAME --api-key=$HEROKU_AUTH_TOKEN
-  only:
-    - master
+    - apk add --no-cache curl
+    - docker login -u _ -p $HEROKU_AUTH_TOKEN registry.heroku.com
+    - docker pull $HEROKU_REGISTRY_IMAGE || true
+    - docker build
+      --cache-from $HEROKU_REGISTRY_IMAGE
+      --tag $HEROKU_REGISTRY_IMAGE
+      --file ./Dockerfile
+      "."
+    - docker push $HEROKU_REGISTRY_IMAGE
+    - chmod +x ./release.sh
+    - ./release.sh
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heruko.yml

-build:
-  docker:
-    web: Dockerfile
-  run:
-    - web: docker-compose build && docker-compose up -d

release.sh

+#!/bin/sh
+
+
+IMAGE_ID=$(docker inspect ${HEROKU_REGISTRY_IMAGE} --format={{.Id}})
+PAYLOAD='{"updates": [{"type": "web", "docker_image": "'"$IMAGE_ID"'"}]}'
+
+curl -n -X PATCH https://api.heroku.com/apps/$HEROKU_APP_NAME/formation \
+  -d "${PAYLOAD}" \
+  -H "Content-Type: application/json" \
+  -H "Accept: application/vnd.heroku+json; version=3.docker-releases" \
+  -H "Authorization: Bearer ${HEROKU_AUTH_TOKEN}"
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