Update readme with archived notice.

Author: aramprice

README.md

@@ -1,36 +1,5 @@
-# Config Server
+# Deprecated
 
-- CI: <https://main.bosh-ci.cf-app.com/teams/main/pipelines/config-server>
-- [API Docs](docs/api.md)
+This repository is deprecated.
 
-See [config-server-release](https://github.com/cloudfoundry/config-server-release) for the release repo for config-server
-See [bosh-notes](https://github.com/cloudfoundry/bosh-notes/blob/master/proposals/config-server.md) for more information
-
-## Contributing
-
-All PRs and code should be against the `develop` branch.  Before submitting PRs, you should make sure that tests are passing properly.
-
-### Unit tests
-
-Before running the unit test on your local machine, you should install
-`golangci-lint` following its documentation, see
-<https://github.com/golangci/golangci-lint>. (Indeed, the way the
-[lint](bin/lint) script installs `golangci-lint` is not suitable for running
-on a local machine.)
-
-Then run the unit tests using the dedicated script. 
-
-```bash
-bin/test-unit
-```
-
-### Integration tests
-
-There are 3 distinct flavors of integration tests. Run the relevant one, or
-all, depending on the changes you've done.
-
-```bash
-bin/test-integration memory     # <- uses an in-memory database
-bin/test-integration mysql      # <- uses a MySQL database
-bin/test-integration postgresql # <- uses a PostgreSQL database
-```
+The code here has been merged into https://github.com/cloudfoundry/config-server-release/