fenn-door — deploy door for fenn.dakotawilliams.net (this project only)

POST /deploy   header: x-door-key: <your key>
  full set:   {"files": {"index.html": "<html...>", "assets/app.js": "..."}, "message": "what changed"}
  one file:   {"path": "index.html", "content": "<html...>", "message": "..."}
              (a partial send merges over what is live now)
  binary:     {"path": "assets/photo.png", "base64": "iVBORw0..."}
  wipe:       {"mode": "replace", "files": {...}}   (nothing kept)
GET  /files    -> JSON {files: [paths live now]}
GET  /file?path=index.html -> that file's raw text