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I am trying to build the quip gdrive live app example from quip. Following the quip liveapps instructions https://quip.com/dev/liveapps/1.x.x/guide/getting-started/ and when I run the npm run build command I get an error "NODE_ENV" is not recognized as an internal or external command, operable program or batch file.I am running Windows 10, Python 3.9 installed Node.js 14.16.1 from the website link in https://quip.com/dev/liveapps/1.x.x/guide/getting-started/ .Can anyone point me in the right direction to resolving this?