I came across the Quick Start Guide: Get O3 running on your machine quickly and my question is: Do I need to install and use Docker to work on openMRS Frontend UI (React Development)?
No! Kindly here is a developer guide OpenMRS Frontend 3.0 Documentation for Developers. The one you shared is an implementer guide.
Thank you @jwnasambu for clearing out my doubts and helping me to find the right place