ECM Catalog Server

Shares a folder of Electronic Catalog Maker (.ecatm) catalog files from
your own computer with anyone who visits its address — on your local
network, or (optionally) over the internet via a temporary Cloudflare
Quick Tunnel, no router configuration or account needed.

Launch it and a status page opens in your browser: pick the folder to
share, choose local-network or internet mode, and copy the address to
hand out. Visitors see a list of the catalogs in that folder, each with
a Copy URL button and an instant in-browser Preview — no app install
required on their end.

This is a companion tool for the free Electronic Catalog Maker editor and
viewer (https://tapalog.com/), for distributing catalogs straight from a
local disk or flash drive.

No files are ever written to disk by this app beyond a small settings
file remembering the last folder/mode you picked
(~/.ecm-catalog-server/config.json) — catalog files themselves are only
ever read, never modified.