adding CI/CD pipeline

.gitlab-ci.yml

@@ -6,7 +6,7 @@ build-esap-gui:
     image: docker:latest
     stage: build
     before_script:
-      - 'command -v ssh-agent >/dev/null || ( apt-get update -y && apt-get install npm -y )'
+      - 'command -v ssh-agent >/dev/null || ( apt-get update -y && apt-get install yarn npm -y )'
     script:
       - echo "Building deploy package"
       - yarn install