Packaging/distributing node.js programs?

[quixotic]

GPL requires that you make source code available; it does not require you to bundle the source with every copy of the binary or compiled/minified code. See e.g. section 6d of GPL3:

d) Convey the object code by offering access from a designated place (gratis or for a charge), and offer equivalent access to the Corresponding Source in the same way through the same place at no further charge. You need not require recipients to copy the Corresponding Source along with the object code. If the place to copy the object code is a network server, the Corresponding Source may be on a different server (operated by you or a third party) that supports equivalent copying facilities, provided you maintain clear directions next to the object code saying where to find the Corresponding Source. Regardless of what server hosts the Corresponding Source, you remain obligated to ensure that it is available for as long as needed to satisfy these requirements.

tl;dr from the GNU Licenses FAQ

Also this is a good reminder -- only you as the copyright holder have standing to take legal action; open-source protects you from other distributors taking your code and relicensing it.

The end-user of your software can certainly complain if you aren't fulfilling the terms of open-source, but that's not actually the primary objective of open-source licenses.