_                  __                      
 (_)_ __ ___   __ _ / _| ___  _ __ _ __ ___  
 | | '_ ` _ \ / _` | |_ / _ \| '__| '_ ` _ \ 
 | | | | | | | (_| |  _| (_) | |  | | | | | |
 |_|_| |_| |_|\__, |_|  \___/|_|  |_| |_| |_|
              |___/                          

  Image Resize API - Sharp-powered image processing

ENDPOINTS
  POST /api/resize    Resize images to multiple sizes
  GET  /health        Health check

USAGE
  curl -X POST https://your-domain/api/resize \
    -H "X-Presigned-Token: {exp}.{signature}" \
    -F "image=@photo.jpg" \
    -F 'sizes=[{"name":"thumb","width":200,"height":200}]'

RESPONSE
  {
    "images": { "thumb": { "data": "base64...", "width": 200, ... } },
    "placeholder": "data:image/webp;base64,..."
  }