Add license note to README

README.md

@@ -8,6 +8,12 @@ applications run on Kubernetes.
 
 Older versions (<= 1.0.0) of this controller used the `math/rand` package for generating secrets, which is deterministic and not cryptographically secure (see #1 for more information). If you're already running this controller and want to regenerate all potentially compromised secrets, start the controller with the `-regenerate-insecure` flag (note that you will need to manually re-create any Pods using these secrets, though). When using the `kubectl apply` command from below, the new flag will be added to your Deployment automatically.
 
+## License
+
+Copyright 2023 Mittwald CM Service GmbH & Co. KG and [contributors](https://github.com/mittwald/kubernetes-secret-generator/graphs/contributors)
+
+This project is licensed under the [Apache License, Version 2.0](./LICENSE.txt).
+
 ## Deployment
 
 ### Helm