chore(deploy): store uploads on the Hetzner volume

Mount /mnt/HC_Volume_105945736/vfxreview-uploads at /app/uploads
instead of ./uploads, so uploads no longer fill the VPS root disk.
The host folder must be owned by uid 1001 (the nextjs user).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docker-compose.yml

@@ -11,7 +11,8 @@ services:
       - .env
 
     volumes:
-      - ./uploads:/app/uploads
+      # Uploads live on the Hetzner volume, not the root disk (uid 1001 must own it)
+      - /mnt/HC_Volume_105945736/vfxreview-uploads:/app/uploads
 
     depends_on:
       postgres: