adding ci/cd

.dockerignore

+.git
+.gitignore
\ No newline at end of file

.gitlab-ci.yml

+build:
+  stage: build
+  tags:
+    - docker-builder
+  image: docker:latest
+  variables:
+    DOCKER_BUILDKIT: 1
+    GIT_SUBMODULE_STRATEGY: recursive
+    GIT_SUBMODULE_DEPTH: 1
+    GIT_SUBMODULE_UPDATE_FLAGS: --jobs 4
+  before_script:
+    - docker info
+    - docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
+    - docker pull $CI_REGISTRY_IMAGE:latest || true
+  script:
+    - docker build --tag $CI_REGISTRY_IMAGE:latest  .
+    - docker push $CI_REGISTRY_IMAGE:latest
+