webhook — an ephemeral request bin (in-RAM, idle-expiring)

Capture and inspect exactly what a third party (Stripe, GitHub, a CI runner)
POSTs to a URL, then watch it arrive live. Like requestbin / webhook.site, for
the terminal. Nothing touches disk; bins expire after ~2h idle.

1. MAKE A BIN
  curl https://webhook.0exec.com/new
  # → bin: 7Qk2aPbR
  #   url: https://webhook.0exec.com/7Qk2aPbR

2. POINT THE SENDER AT THE CAPTURE URL — any method is recorded
  curl -X POST -H 'X-Demo: hi' -d 'payload' https://webhook.0exec.com/7Qk2aPbR
  # → {"ok":true,"bin":"7Qk2aPbR","count":1}

3. INSPECT WHAT LANDED
  curl 'https://webhook.0exec.com/7Qk2aPbR?inspect'    # all captures, newest first (JSON array)
  curl 'https://webhook.0exec.com/7Qk2aPbR?last'       # just the most recent capture (JSON)

4. WATCH LIVE (streams new captures as they arrive, one JSON object per line)
  curl -N 'https://webhook.0exec.com/7Qk2aPbR?follow'

5. CLEAR THE BIN
  curl -X DELETE https://webhook.0exec.com/7Qk2aPbR

Each capture records: method, path, raw query, all headers, body (capped at
~1 MiB), sender IP, and an RFC3339 timestamp. A bin keeps the ~100 most recent.

Notes:
  * Anyone with a bin's URL can write to it and read it — use a fresh bin per
    debugging session and don't send real secrets through a third party to it.
  * The capture URL accepts ANY method; ?inspect / ?last / ?follow are GET-only
    and never themselves recorded.
  * zsh "no matches found"? Quote any URL with a '?'  e.g. 'https://webhook.0exec.com/<id>?inspect'.