Add Cloudflare DNS support to Caddy configuration

- Updated .env.example to include CF_ZONE_READ and CF_DNS_EDIT variables.
- Enhanced Caddyfile to utilize Cloudflare DNS for TLS.
- Created Dockerfile for building Caddy with Cloudflare DNS support.
- Modified docker-compose.yml to use the new caddy-cloudflare image and set environment variables.

caddy/docker-compose.yml

@@ -1,7 +1,7 @@
 services:
 
   caddy:
-    image: caddy/caddy:latest
+    image: caddy-cloudflare
     restart: always
     ports:
       - 80:80
@@ -11,6 +11,9 @@ services:
       - ./Caddyfile:/etc/caddy/Caddyfile
       - caddy_data:/data
       - caddy_config:/config
+    environment:
+      CF_ZONE_READ: ${CF_ZONE_READ}
+      CF_DNS_EDIT: ${CF_DNS_EDIT}
     extra_hosts:
       - host.docker.internal:host-gateway
     labels: