Fly supports running your app in 34 regions all over the world. The Epic Stack is set up to allow you to run in as many of these regions as you like, but for cost reasons, it's best to start out with a single region until your app needs that level of scale.
Region selection has an important impact on the performance of your app. When you're choosing a single region, you're choosing who your app is going to be slower for. So you really should choose the region that's closest to the most critical/closest users.
Unfortunately, there's no way for us to know this for every app. We can't just select a region for you. And we also can't just select the region that's closest to you. We need you to actually think about and make this decision.
Ask which region the app should be deployed to during setup.
Forces the developer to make a choice (goes against the "Minimize Setup Friction" guiding principle). However, we can make it slightly better by defaulting to the region that's closest to the developer.
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