docs, stacks: Caddyfiles moved to a folder mount (conf/Caddyfile)

stacks/platform/caddy-internal/docker-compose.yaml

@@ -6,11 +6,11 @@ services:
     ports:
       - "${HTTPS_PORT}:443"
     volumes:
-      - ./Caddyfile:/etc/caddy/Caddyfile
+      - ./conf:/etc/caddy:ro
       - /path/to/caddy-internal/caddy_data:/data
       - /path/to/caddy-internal/caddy_config:/config
       - /path/to/caddy-internal/logs:/var/log/caddy
-      - ./certs/pki_int_ca.crt:/etc/caddy/certs/pki_int_ca.crt:ro
+      - ./certs:/etc/caddy/certs:ro
     networks:
       - caddy-net