fix: remove unused image handling in Caddyfile and ensure recipe images are served correctly

compose.flutter.yml

@@ -12,6 +12,8 @@ services:
       PORT: "5000"
     ports:
       - "5000:5000"
+    volumes:
+      - recipe_images:/usr/share/caddy/images
     depends_on:
       recipe-api:
         condition: service_healthy

flutter/Caddyfile

@@ -1,11 +1,6 @@
 :{$PORT:5000} {
     root * /usr/share/caddy
 
-    # Recipe images are stored in a shared volume and served by the Next service.
-    handle /images/* {
-        reverse_proxy recipe-frontend:3000
-    }
-
     # Proxy API calls to backend service on the internal Docker network.
     handle /api/* {
         reverse_proxy recipe-api:8080