Today I want to talk about the least-exciting part of developing an application, configuration. All those pesky little details that change across environments, or might change. You’ve done the smart thing and factored them out into environment variables, or key-value-pairs in a configuration file, etc… And now your application’s code is clear and concise, and works great when you flip between production and development mode. However, there’s still one unanswered question - where do you actually store all of this configuration?