test: percy visual testing (#1053)

* test: percy visual testing init

* Try PR checks with custom command

* Only run percy visual tests for PWA on merge for now

.circleci/config.yml

@@ -344,6 +344,7 @@ workflows:
           build: npx cross-env QUICK_BUILD=true yarn run build
           start: yarn run test:e2e:serve
           wait-on: 'http://localhost:3000'
+          command: 'yarn run test:e2e:ci'
           cache-key: 'yarn-packages-{{ checksum "yarn.lock" }}'
           no-workspace: true # Don't persist workspace
           post-steps: