Information curation and knowledge management is a critical skill for fullstack problem solving. Having an online platform to share how-tos, expertise, and lessons learned is corner stone for being a fullstack problem solver.
There are a infinite and every-changing breadth technologies and existing platforms that allow users to setup a online/website portfolio.
Following this guide should allow anyone to setup their own website as an online portfolio to share ideas, learning journeys, and projects. The technology used as part of this guide is open source and free.