Add new file

.gitlab-ci.yml

@@ -0,0 +1,11 @@
+build-docker:
+    image: docker:latest
+    before_script:
+        - docker login -u "$CI_REGISTRY_USER" -p "$CI_REGISTRY_PASSWORD" $CI_REGISTRY
+    script:
+        - docker build --pull -t illegitimate:$CI_COMMIT_BRANCH .
+        - docker push illegitimate:$CI_COMMIT_BRANCH
+    rules:
+    - if: $CI_COMMIT_BRANCH === "main"
+      exists:
+        - Dockerfile