Added gitlab ci file

.gitlab-ci.yml

@@ -0,0 +1,18 @@
+build:
+  image: docker:cli
+  stage: build
+  services:
+    - docker:dind
+  variables:
+    DOCKER_IMAGE_NAME: $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG
+  before_script:
+    - docker login -u "$CI_REGISTRY_USER" -p "$CI_REGISTRY_PASSWORD" $CI_REGISTRY
+  script:
+    - |
+      docker build -t "image" .
+
+      docker tag "image" "$CI_REGISTRY_IMAGE:$CI_COMMIT_SHORT_SHA"
+      docker push "$CI_REGISTRY_IMAGE:$CI_COMMIT_SHORT_SHA"
+
+      docker tag "image" "$CI_REGISTRY_IMAGE:main"
+      docker push "$CI_REGISTRY_IMAGE:main"