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.gitlab-ci.yml

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+# .gitlab-ci.yml
+
+variables:
+  IMAGE_TAG: $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG
+  # Tell 'docker:dind' to enable TLS (recommended)
+  # and generate certificates in the specified directory.
+  DOCKER_TLS_CERTDIR: "/certs"
+
+build-push-docker-image-job:
+  # Specify a Docker image to run the job in.
+  image: docker:latest
+  # Specify an additional image 'docker:dind' ("Docker-in-Docker") that
+  # will start up the Docker daemon when it is brought up by a runner.
+  services:
+    - docker:dind
+  script:
+    - docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
+    - docker build -t $IMAGE_TAG .
+    - docker push $IMAGE_TAG