process.env
is a reference to your environment, so you have to set the variable there.
To set an environment variable in Windows:
SET NODE_ENV=development
on macOS / OS X or Linux:
export NODE_ENV=development
process.env
is a reference to your environment, so you have to set the variable there.
To set an environment variable in Windows:
SET NODE_ENV=development
on macOS / OS X or Linux:
export NODE_ENV=development