If you're familiar with the Twelve-Factor App or have worked with Docker much, you'll know that configuration may be done using environment variables rather than managing multiple disparate configuration files. According to The Twelve-Factor App (https://12factor.net/config):
"Env vars are easy to change between deploys without changing any code; unlike config files, there is little chance of them being checked into the code repo accidentally; and unlike custom config files, or other config mechanisms such as Java System Properties, they are a language- and OS-agnostic standard."
Using environment variables for FaaS enables code deployments to different systems (dev, QA, production, and so on). Changing ...
