How to Setup a Sharepoint App Server

http://msdn.microsoft.com/en-us/library/fp179923(v=office.15).aspx

Granting Access


1. Create a New User (dgk)

2.add that user to AD (to Administrators group and Domain Admin Groups)
3.Goto Central Administrator 
4. Security -> Manage the farm administrators group -> Add Newly Create user there
5. Security ->  Configure service accounts -> go to your web application -> change Select an account for this component to another account
6. Go to  MSSQL Server management studio -> SharePoint_Config -> Security -> Users -> add user to it and grant permission to -> Membership -> DB Owner and SecurityAdmin
7. Owned Schemas -> DB Owner
8.Refresh the DB
9.Again Go to
 Security >  Configure service accounts -> go to your web application -> change Select an account for this component to Previous Account/ User
10. Done!

For More :

http://www.sharepoint-journey.com/app-development-in-sharepoint.html

http://algrandi.azurewebsites.net/index.php/sharepoint-2013-error-occurred-in-deployment-step-install-app-for-sharepoint/

http://www.sharepoint-journey.com/whats-new-for-endusers-in-sharepoint-2013.html