How to: ConfigMaps
[ConfigMaps](https://kubernetes.io/docs/concepts/configuration/configmap/) are used to decouple configuration data from application code. The configuration data may be variables, files or command-line args.

- ConfigMaps should be created before creating an application that relies on it
- A ConfigMap created from a directory includes all the files in that directory and the default behaviour is to use the filenames as keys

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