`docker load -i` shows no useful progress and the installer captured its output
into a variable, so a ~12G load looked like a multi-minute hang. Stream the
tarball through a meter into `docker load` instead — the file read tracks load
progress closely. Prefer `pv` (bar + ETA), fall back to GNU `dd status=progress`
(bytes + throughput), else plain load with a tip to install pv. The meter draws
on stderr so the "Loaded image:" line is still captured. Pre-authenticate sudo
first so its prompt doesn't collide with the bar.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01RdMufYvtTbtGDWsiZVoXce