ic: FCC's CONTRIBUTING.md modified for arcade-mode
ic: FCC's CONTRIBUTING.md modified for arcade-mode

freeCodeCamp/arcade-mode,freeCodeCamp/arcade-mode,freeCodeCamp/arcade-mode,kevinnorris/arcade-mode,kevinnorris/arcade-mode,kevinnorris/arcade-mode,freeCodeCamp/arcade-mode,kevinnorris/arcade-mode