Add prerequisites task to Makefile which warns about installation of Ruby and bundler
Add prerequisites task to Makefile which warns about installation of Ruby and bundler

Parth-Mehrotra/tldr,WANG-lp/tldr,UncommonPleb/tldr,deekim/tldr,katekyan/tldr,AgamAgarwal/tldr,katekyan/tldr,slash3b/tldr,zoisom/tldr,rubenvereecken/tldr,igorshubovych/tldr,davidsiefert/tldr,rubenvereecken/tldr,ArturSkowronski/tldr,cptdeka10/tldr,davidsiefert/tldr,WANG-lp/tldr,ArturSkowronski/tldr,zoisom/tldr,katekyan/tldr,mshmoustafa/tldr,Phizho/tldr,slash3b/tldr,UncommonPleb/tldr,igorshubovych/tldr,Phizho/tldr,mshmoustafa/tldr,AgamAgarwal/tldr,zoisom/tldr,WALL-E/tldr,kuanyui/tldr,deekim/tldr,Phizho/tldr,slash3b/tldr,Parth-Mehrotra/tldr,WALL-E/tldr,felixonmars/tldr,UncommonPleb/tldr,deekim/tldr,cptdeka10/tldr,felixonmars/tldr,felixonmars/tldr,kuanyui/tldr,cptdeka10/tldr