Node Program Runs in Terminal, but Not As a “do shell script” AppleScript
This was solved by KniazidisR at https://macscripter.net/viewtopic.php?pid=196447#p196447

set nodePath to "/usr/local/Cellar/node/12.5.0/bin/node "
set mercuryParserPath to "/usr/local/bin/mercury-parser "
set pageURL to "https://postlight.com/trackchanges/mercury-goes-open-source"

do shell script nodePath &amp; mercuryParserPath &amp; pageURL