added a pipeline to help build and deploy the docker code

.gitlab-ci.yml

@@ -0,0 +1,30 @@
+stages:
+  - build
+  - deploy
+build:
+  stage: build
+  image: ahmza/hugo
+  script:
+    - git submodule update --init --recursive
+    - hugo -d public_html -b "${BLOG_URL}"
+  cache:
+    paths:
+      - public_html
+  artifacts:
+    paths:
+      - public_html
+  only:
+    -master
+deploy:
+  stage: deploy
+  image: ahmza/rsync-ssh
+  script:
+    - echo "${SSH_PRIVATE_KEY}" > id_rsa
+    - chmod 700 id_rsa
+    - mkdir "${HOME}/.ssh"
+    - echo "${SSH_HOST_KEY}" > "${HOME}/.ssh/known_hosts"
+    - rsync -hrvz --delete --exclude=_ -e 'ssh -i id_rsa' public_html/ "${SSH_USER_HOST_LOCATION}"
+    only:
+      -master
+
+