apptension/developer-handbook: An opinionated guide on how to become a professional Web/Mobile App Developer.An opinionated guide on how to become a professional Web/Mobile App Developer. - apptension/developer-handbook#github#repositories#guides#mobile#web dev#checklist·github.com·Oct 27, 2024apptension/developer-handbook: An opinionated guide on how to become a professional Web/Mobile App Developer.