Added first version of CI to build container(s)

.gitlab-ci.yml

+image: docker:20.10.16
+
+stages:
+  - build
+  - deploy
+
+services:
+  - docker:20.10.16-dind
+
+before_script:
+  - echo "$CI_REGISTRY_PASSWORD" | docker login $CI_REGISTRY -u $CI_REGISTRY_USER --password-stdin
+
+variables:
+  LATEST_NAME: $CI_REGISTRY_IMAGE/$IMAGE_NAME
+  UNIQUE_NAME: $CI_REGISTRY_IMAGE/$IMAGE_NAME:$CI_COMMIT_SHA
+  DEPLOY_NAME: $CI_REGISTRY_IMAGE/$IMAGE_NAME:stable
+
+build:
+  stage: build
+  script:
+    - docker build -t $LATEST_NAME .
+    - docker image tag $LATEST_NAME $UNIQUE_NAME
+    - docker push $LATEST_NAME
+    - docker push $UNIQUE_NAME
+
+deploy:
+  stage: deploy
+  script:
+    - docker image tag $LATEST_NAME $DEPLOY_NAME
+    - docker push $DEPLOY_NAME
+  only:
+    - deploy