Add .gitlab-ci.yml

.gitlab-ci.yml

+# The Docker image that will be used to build your app
+image: portfolio
+
+pages:
+    stages: deploy
+    script:
+        - echo "The site will be deploy to $CI_PAGES_URL"
+    artifacts:
+        paths:
+            - portfolio
+    rules:
+        - if $CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH