docs(readme): Add reuse status badge

Signed-off-by: Andy Scherzinger <[email protected]>

Author: AndyScherzinger

README.md

@@ -2,9 +2,10 @@
  - SPDX-FileCopyrightText: 2023 Nextcloud GmbH and Nextcloud contributors
  - SPDX-License-Identifier: AGPL-3.0-or-later
 -->
-
 # Nextcloud AppAPI Docker Socket Proxy
 
+[![REUSE status](https://api.reuse.software/badge/github.com/nextcloud/docker-socket-proxy)](https://api.reuse.software/info/github.com/nextcloud/docker-socket-proxy)
+
 This is a **Security-Enhanced** proxy for the Docker Socket *specifically* for AppAPI.
 
 It comes with built-in authentication and strict bruteforce protection.