Update readme with build script and link to CLI docs
Update readme with build script and link to CLI docs

pedronasser/caddy,dusty/caddy,tobya/caddy,tobya/caddy,ollie314/caddy,buddhamagnet/caddy,DenBeke/caddy,ollie314/caddy,devangels/caddy,cez81/caddy,dusty/caddy,evermax/caddy,yukimochi/caddy,captncraig/caddy,elcore/caddy,captncraig/caddy,yukimochi/caddy,mem/caddy,yukimochi/caddy,joshix/caddy,tpng/caddy,evermax/caddy,pedronasser/caddy,eiszfuchs/caddy,pedronasser/caddy,joshix/caddy,cez81/caddy,tw4452852/caddy,tpng/caddy,tobya/caddy,pedronasser/caddy,elcore/caddy,mem/caddy,tpng/caddy,pyed/caddy,DenBeke/caddy,dusty/caddy,tpng/caddy,ollie314/caddy,cez81/caddy,tw4452852/caddy,mem/caddy,eiszfuchs/caddy,elcore/caddy,evermax/caddy,pyed/caddy,dusty/caddy,pyed/caddy,eiszfuchs/caddy,buddhamagnet/caddy,mem/caddy,devangels/caddy,DenBeke/caddy,ollie314/caddy,joshix/caddy,evermax/caddy,DenBeke/caddy,pyed/caddy,buddhamagnet/caddy,captncraig/caddy,tw4452852/caddy,devangels/caddy,eiszfuchs/caddy,tw4452852/caddy,tobya/caddy,buddhamagnet/caddy