added runner tag

.gitlab-ci.yml

 build-job:
     stage: build
+    tags:
+        - rcds
     script:
         - echo "Hello, $GITLAB_USER_LOGIN"
 
 test-job1:
     stage: test
+    tags:
+        - rcds
     script:
         - echo "This job tests something"
 
 test-job2:
     stage: test
+    tags:
+        - rcds
     script:
         - echo "This job tests something, but takes more time than test-job1"
         - echo "Sleeps for 20 seconds"
@@ -17,6 +23,8 @@ test-job2:
 
 deploy-prod:
     stage: deploy
+    tags:
+        - rcds
     script:
         - echo "This job deploys something from $CI_COMMIT_BRANCH branch."
     environment: production