Add gitlab ci file for docker builds

.gitlab-ci.yml

@@ -0,0 +1,30 @@
+workflow:
+  rules:
+    - if: $CI_PIPELINE_SOURCE == 'merge_request_event'
+    - if: $CI_COMMIT_TAG
+    - if: $CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH
+
+include:
+  - project: 'deepl/ops/ci-cd-infrastructure/gitlab-ci-lib'
+    file:
+      - '/templates/.buildkit.yml'
+
+stages:
+  - build
+
+build:
+  stage: build
+  extends: .buildkit
+  rules:
+    - if: $CI_COMMIT_TAG =~ /^\d{4}\.\d{1,2}\.\d+-fork-v\d+$/
+    - when: manual
+      allow_failure: true
+  tags:
+    - k8s
+  variables:
+    TAG: $CI_COMMIT_TAG
+    HARBOR_REGISTRY_PROJECT: research
+    DOCKER_IMAGE: ${HARBOR_REGISTRY}/research/${CI_PROJECT_NAME}
+    BUILDKIT_IMAGE: ${DOCKER_IMAGE}:${TAG}
+    BUILDKIT_DOCKERFILE_DIR: dask_kubernetes/operator/deployment
+    BUILDKIT_DOCKERFILE_NAME: Dockerfile