Added an example of fronting the playbook's integrated Traefik reverse-proxy with the existing Caddy container (not the apt-get or yum installed Caddy). Helpful for folks who have an existing server with a Caddy container already serving multiple applications.

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

@@ -0,0 +1,22 @@
+version: "3.9"
+
+services:
+  caddy:
+    image: caddy:2.5.1-alpine
+    networks:
+      # add this, so that caddy can talk to the playbook-managed-traefik 
+      - traefik
+    ports:
+      - "80:80"
+      - "443:443"
+      - "8448:8448"
+    volumes:
+      - ./Caddyfile:/etc/caddy/Caddyfile
+    #   - ./site:/var/www
+    # Other configurations ...
+
+networks:
+  # add this as well
+  traefik:
+    name: traefik
+    external: true