Setting up REUSE: add copyright statements to files in examples/

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

examples/reverse-proxies/caddy2-in-container/Caddyfile

@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2024 MDAD Team and contributors
+#
+# SPDX-License-Identifier: AGPL-3.0-or-later
+
 matrix.example.com {
 
   handle {

examples/reverse-proxies/caddy2-in-container/README.md

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+<!--
+SPDX-FileCopyrightText: 2024 MDAD Team and contributors
+
+SPDX-License-Identifier: AGPL-3.0-or-later
+-->
+
 # Caddy reverse-proxy fronting the playbook's integrated Traefik reverse-proxy
 
 This directory contains a sample config that shows you how to front the integrated [Traefik](https://traefik.io/) reverse-proxy webserver with your own **containerized** [Caddy](https://caddyserver.com/) reverse-proxy. If you have a server with a Caddy container already serving several applications and you want to install Matrix on it (with no changes to existing traffic routing), then this guide is for you.

examples/reverse-proxies/caddy2-in-container/docker-compose.yaml

@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2024 MDAD Team and contributors
+#
+# SPDX-License-Identifier: AGPL-3.0-or-later
+
 ---
 version: "3.9"