Use an existing docker hub image

.circleci/config.yml

@@ -18,7 +18,7 @@ executors:
   # Custom executor to override Cypress config
   deploy-to-prod-executor:
     docker:
-      - image: 'cypress/browsers:chrome76'
+      - image: 'cypress/browsers:node10.16.0-chrome77'
         environment:
           CYPRESS_BASE_URL: https://ohif-staging.netlify.com/