KEY -f
Return a single environment variable's value from a specific .env file.
Usage
$ echo "HELLO=World" > .env
echo "HELLO=production" > .env.production
dotenvx get HELLO -f .env.production
production$ echo "HELLO=World" > .env
echo "HELLO=production" > .env.production
dotenvx get HELLO -f .env.production
production