This is a simple URL shortener that reads from a google spreadsheet.
First export your sheet so it is readable by Tabletop. You'll need two
of the columns named ShortURL segment and Target URL.
Then add the pubhtml link to config.js under SHEET_KEY.
Run npm install to install dependencies, then npm index.js to start the resolution server.
Add URLs as needed - if you want the change to take effect immediately, go to http://your-hostname:<port>/_forcereload and it'll automatically re-parse the spreadsheet.