It’s not basically for the challenge. I intend to start a web development school in my country and I want my students to be doing practice there. And when they have a problem, they can easily give any of the tutors the link (like codepen link) to view the codes and point out the errors. I dont want to use codepen, dabblet or any other. I want the school to have a customized one and also a forum where the students can interact and brainstorm.
So u mean for mean to build a robust one like codepen, I will need to master php and ruby?