twimg-worker - image & video storage proxy

POST /upload
  multipart/form-data: url=<media URL> or file=<image/video>
  application/json: { "url": "https://pbs.twimg.com/..." }

GET|HEAD /<resource_id>
  Reads from SOURCE_BACKENDS priority. Default: twitter,tg,r2

Environment:
  UPLOAD_BACKENDS=tg,r2
  SOURCE_BACKENDS=twitter,tg,r2