ci: make sure we're updating the base branch for comparisons (percy)

.circleci/config.yml

@@ -444,6 +444,27 @@ workflows:
           filters:
             branches:
               only: master
+      # Update base branch snapshots
+      - cypress/run:
+          name: 'Generate Percy Snapshots'
+          executor: cypress/browsers-chrome76
+          pre-steps:
+            - run: 'rm -rf ~/.yarn && npm i -g yarn && yarn -v && yarn global
+                add wait-on' # Use yarn latest
+          yarn: true
+          store_artifacts: false
+          working_directory: platform/viewer
+          build: npx cross-env QUICK_BUILD=true yarn run build
+          # start server --> verify running --> percy + chrome + cypress
+          command: yarn run test:e2e:dist
+          cache-key: 'yarn-packages-{{ checksum "yarn.lock" }}'
+          no-workspace: true # Don't persist workspace
+          post-steps:
+            - store_artifacts:
+                path: platform/viewer/cypress/screenshots
+          filters:
+            branches:
+              only: master
       - DOCKER_MASTER_PUBLISH:
           requires:
             - NPM_PUBLISH