为什么我的rails应用程序没有部署（H10代码错误）和rails服务器无法启动？

I am at the very start of a rails app with just a "hello world" page and the basic skeleton. i am trying to deploy to heroku before i start working on it. however, on both production and local server i can not get the app to start. I did have it start once on local host 3000 but now i changed something and it doesn work. the only things i changed were putting the sqlite gem into devlopment and pg gem into production since herku doesnt work with sqlite. please see following errors:I am at the very start of a rails app with just