Add config file

.gitlab-ci.yml

+stages:
+  # - test
+  - deploy
+ 
+# test:
+#   stage: test
+#   tags:
+#       - ruby
+#   only:
+#       - master
+#   script:
+#     - apt-get update -qy
+#     - apt-get install -y nodejs
+#     - gem install bundler:2.1.4
+#     - bundle install
+#     - yarn install --check-files
+#     - rails db:migrate
+#     - rails test
+ 
+deploy:
+  stage: deploy
+  tags:
+    - ruby
+  environment:
+    name: production
+  only:
+    - master
+  script:
+    - which ssh-agent || ( apt-get update -y && apt-get install openssh-client -y )
+    - eval $(ssh-agent -s)
+    - ssh-add <(echo -e "$PRIVATE_KEY")
+    - gem install capistrano
+    - gem install bundler:2.1.4
+    - bundle install
+    - bundle exec cap production deploy
\ No newline at end of file