Updated Setup (markdown)
Write troubleshooting
Fixing typos
Updated Home (markdown)
New frontend documentation written by @santinodenbrave and @sohaibelb
New back-end documentation written by @Timvandermeys
Updated Back end (markdown)
Updated Front end (markdown)
Updated Contributing (markdown)
Updated Application user workflow (markdown)
Created Contributing (markdown)
Created Front-end (markdown)
Created Back-end (markdown)