Add app.json for heroku review apps
Add app.json for heroku review apps

scott-riley/loggins,PactCoffee/loggins,tomgatzgates/loggins,PactCoffee/loggins,rdjpalmer/loggins,scott-riley/loggins,tomgatzgates/loggins,iest/loggins,iest/loggins,chrisspang/loggins,rdjpalmer/loggins,chrisspang/loggins