Update README with the web/ path.
Update README with the web/ path.

Update the documentation in the README to refer to the newer `web/`
directory instead of `lib/app/`.

vic/phoenix,optikfluffel/phoenix,vic/phoenix,cas27/phoenix,paulcsmith/phoenix,yonglehou/phoenix,rodrigues/phoenix,stefania11/phoenix,korobkov/phoenix,Dahoon/phoenix,jxs/phoenix,korobkov/phoenix,manukall/phoenix,mitchellhenke/phoenix,dmarkow/phoenix,foxnewsnetwork/phoenix,stevedomin/phoenix,jwarwick/phoenix,0x00evil/phoenix,hotvulcan/phoenix,trarbr/phoenix,michalmuskala/phoenix,sdnorm/phoenix,Ben-Evolently/phoenix,ybur-yug/phoenix,robhurring/phoenix,ericmj/phoenix,bsmr-erlang/phoenix,Joe-noh/phoenix,begleynk/phoenix,0x00evil/phoenix,optikfluffel/phoenix,phoenixframework/phoenix,Fluxuous/phoenix,doron2402/phoenix,robomc/phoenix,kyledecot/phoenix,jeffkreeftmeijer/phoenix,thegrubbsian/phoenix,scrogson/phoenix,VictorZeng/phoenix,bdtomlin/phoenix,tony612/phoenix,andrewvy/phoenix,ahmetabdi/phoenix,Kosmas/phoenix,StevenNunez/phoenix,gjaldon/phoenix,yoavlt/phoenix,mschae/phoenix,pap/phoenix,iStefo/phoenix,ericmj/phoenix,optikfluffel/phoenix,wicliff/phoenix,seejee/phoenix,jeffweiss/phoenix,bitgamma/phoenix,phoenixframework/phoenix,manukall/phoenix,trarbr/phoenix,romul/phoenix,omotenko/phoenix_auth,evax/phoenix,mvidaurre/phoenix,CD1212/phoenix,xtity/simple_phoenix,Joe-noh/phoenix,bsmr-erlang/phoenix,seejee/phoenix,FND/phoenix,Gazler/phoenix,maxnordlund/phoenix,keathley/phoenix,greyhwndz/phoenix,kidaa/phoenix,brucify/phoenix,rafbgarcia/phoenix,evax/phoenix,KazuCocoa/phoenix,mschae/phoenix,linearregression/phoenix,eksperimental/phoenix,CultivateHQ/phoenix,nshafer/phoenix,JHKennedy4/phoenix,Eventacular/phoenix,wsmoak/phoenix,beni55/phoenix,elliotcm/phoenix,ugisozols/phoenix,nshafer/phoenix,sadiqmmm/phoenix,daytonn/phoenix,fbjork/phoenix,Kosmas/phoenix,justnoxx/phoenix,lono-devices/phoenix,Rumel/phoenix,michalmuskala/phoenix,lono-devices/phoenix,hsavit1/phoenix,Smulligan85/phoenix,nickgartmann/phoenix,wsmoak/phoenix,jamilabreu/phoenix,iStefo/phoenix,lancehalvorsen/phoenix,omotenko/phoenix_auth,arthurcolle/phoenix,andrewvy/phoenix,safi/phoenix,marcioj/phoenix,mobileoverlord/phoenix,DavidAlphaFox/phoenix,ybur-yug/phoenix,rodrigues/phoenix,dmarkow/phoenix,nshafer/phoenix,jasond-s/phoenix,y-yagi/phoenix,esbullington/phoenix-1,henrik/phoenix,Gazler/phoenix,lancehalvorsen/phoenix,mitchellhenke/phoenix,milafrerichs/phoenix,SmartCasual/phoenix,ephe-meral/phoenix,0x00evil/phoenix,keathley/phoenix,DavidAlphaFox/phoenix,nicrioux/phoenix,eksperimental/phoenix,phoenixframework/phoenix,gjaldon/phoenix,switchflip/phoenix,iguberman/phoenix,stevedomin/phoenix,pap/phoenix,doomspork/phoenix,GabrielNicolasAvellaneda/phoenix,jwarwick/phoenix,mvidaurre/phoenix,rafbgarcia/phoenix,kevinold/phoenix,rafbgarcia/phoenix,ephe-meral/phoenix,bsodmike/phoenix,javimolla/phoenix,ACPK/phoenix,Rumel/phoenix,jamilabreu/phoenix,mobileoverlord/phoenix,cas27/phoenix,CultivateHQ/phoenix,kholbekj/phoenix,Smulligan85/phoenix