e2e reference

Signed-off-by: James Milligan <[email protected]>

Author: james-milligan

docs/development_notes.md

@@ -13,6 +13,8 @@ Run `make test` to run the test suite. The controller integration tests use [env
 This provides means of asserting that the Kubernetes components reach the desired state without the overhead of using an actual cluster, keeping
 test runtime and resource consumption down.
 
+An e2e test suite can also be found in the [`/test/e2e`](../test/e2e/DEVELOPER.md) directory. These tests are run as part of the `pr-lint` github action, they work by deploying an nginx reverse proxy and asserting that curls to the proxy elicit expected behaviour from the flagd sidecar created by open-feature-operator.
+
 ## Releases
 
 This repo uses _Release Please_ to release packages. Release Please sets up a running PR that tracks all changes for the library components, and maintains the versions according to [conventional commits](https://www.conventionalcommits.org/en/v1.0.0/), generated when [PRs are merged](https://github.com/amannn/action-semantic-pull-request). When Release Please's running PR is merged, any changed artifacts are published.