Add gitlab-ci ENV vars

.gitlab-ci.yml

@@ -5,6 +5,10 @@ default:
     - gem install bundler -v 2.6.2
     - bundle install
 
+variables:
+  STRIKE_API_KEY: klmnop
+  STRIKE_ACCOUNT_ID: abc
+
 example_job:
   script:
     - bundle exec rake