Cleanup `public_dir` handling
Cleanup `public_dir` handling

emiliocorpus/sinatra,midorineko/sinatra,sethuster/sinatra,jenalgit/sinatra,kumji/sinatra,midorineko/sinatra,guidohcosta/sinatra,ktw1222/sinatra,nju520/sinatra,QLGu/sinatra,howtolearntocode/sinatra,kgrz/sinatra,dariubs/sinatra,kyontan/sinatra,DoraALin/sinatra,miyazawatomoka/sinatra,frechei/sinatra,JonMidhir/sinatra,eileencodes/sinatra,Rayheng/sinatra,ksw2599/sinatra,guidohcosta/sinatra,cyberid41/sinatra,porras/sinatra,gferguson-gd/sinatra,ABaldwinHunter/sinatra-classic,trexnix/sinatra,miyazawatomoka/sinatra,RosenDimov/sinatra,jkowens/sinatra,nju520/sinatra,frechei/sinatra,wzheng1/sinatra,sethuster/sinatra,ganmacs/sinatra,d-bot/sinatra,ksw2599/sinatra,porras/sinatra,howtolearntocode/sinatra,jenalgit/sinatra,ktw1222/sinatra,defsprite/sinatra,ganmacs/sinatra,lastcat/sinatra,cyberid41/sinatra,ryanshaw/sinatra,siberianbear/sinatra,emiliocorpus/sinatra,eileencodes/sinatra,jkowens/sinatra,lastcat/sinatra,gferguson-gd/sinatra,QLGu/sinatra,Rayheng/sinatra,laplaceliu/sinatra,Wirachmat/sinatra,mwpastore/sinatra,autopp/sinatra,nicoayala/sinatra,JonMidhir/sinatra,ryanshaw/sinatra,autopp/sinatra,JonRowe/sinatra,kumji/sinatra,defsprite/sinatra,kyontan/sinatra,ABaldwinHunter/sinatra-classic,Wirachmat/sinatra,nicoayala/sinatra,siberianbear/sinatra,wzheng1/sinatra,burningTyger/sinatra,marocchino/sinatra,jkowens/sinatra,sinatra/sinatra,JonRowe/sinatra,mwpastore/sinatra,RosenDimov/sinatra,sinatra/sinatra,burningTyger/sinatra,JonMidhir/sinatra,davydovanton/sinatra,trexnix/sinatra,DoraALin/sinatra,burningTyger/sinatra,laplaceliu/sinatra,mwpastore/sinatra,davydovanton/sinatra,d-bot/sinatra,dariubs/sinatra