Merge remote-tracking branch 'lotte/search-backend' into w2p-50632_Replace-mock-registry-service-with-implementation

Merge remote-tracking branch 'lotte/search-backend' into w2p-50632_Replace-mock-registry-service-with-implementation

Conflicts:
	src/app/core/core.module.ts

disabled the gecko webdriver, as we're not using it, and downloading it can cause rate limit issues on github

Update README with PR testing process & yarn dependency mgmt notes