What happens to an Azure website while it's being upgraded through an deployment? Usually it goes so quick so you don't see it. But what if you have a huge database that through migration scripts will take several minutes to upgrade, then what happens in the meantime? Are all users trying to access the website denied access? Will they get access to a partially upgraded website or will they see the old one?

**Is there any way to have a temporary website being shown, just a static one showing "Right now we're upgrading our systems" or something?**