Add link to docs on how to run a local registry

Working with @binoue to setup a Tekton dev environment we realized that the docs don't explain how to actually run your own local docker registry (I thought you could just push to the daemon by default!)

DEVELOPMENT.md

@@ -168,7 +168,8 @@ environment variables (we recommend adding them to your `.bashrc`):
 1. `$GOPATH/bin` on `PATH`: This is so that tooling installed via `go get` will
  work properly.
 1. `KO_DOCKER_REPO`: The docker repository to which developer images should be
- pushed (e.g. `gcr.io/[gcloud-project]`). You can also run a local registry
+ pushed (e.g. `gcr.io/[gcloud-project]`). You can also
+ [run a local registry](https://docs.docker.com/registry/deploying/)
  and set `KO_DOCKER_REPO` to reference the registry (e.g. at
  `localhost:5000/mypipelineimages`).