Added app.json
Added app.json

vikramv911/HerokuJenkinsLab,bobbyraju/grade-getting-started,marinator86/bbm,vikramv911/HerokuJenkinsLab,SKatiyar/handi,Japke/heroku,yesmineRz/bot,yesmineRz/bot,sophiag16/gradleForHerokuWin,marinator86/bbm,sophiag16/gradleForHerokuWin,rhart/gradle-getting-started,bobbyraju/grade-getting-started,sophiag16/gradle-getting-started,rhart/gradle-getting-started,erenalptekin/gradle-getting-started,Japke/heroku,heroku/gradle-getting-started,erenalptekin/gradle-getting-started,heroku/gradle-getting-started,sophiag16/gradle-getting-started,heroku/gradle-getting-started