Cloudflare Images Watermarking Worker

Usage: /{imageId}/{variant}?watermark={watermarkId}&opacity={0.2-0.6}&pos={position}&pad={pixels}

Example: /IMAGE_ID/medium?watermark=WATERMARK_ID&opacity=0.4&pos=bottom-right&pad=30

Positions: top-left, top-right, bottom-left, bottom-right, center
Opacity: 0.2 to 0.6 (20% to 60%)
Padding: 0 to 100 (pixels from edge)

Cache Management:
POST /purge?url=FULL_IMAGE_URL - Purge specific cached image