print dotenv environmetns with format
npm install -g fdenv
$ fdenv --help
Usage: fdenv [options]
Options:
-h, --help output usage information
-V, --version output the version number
-p, --prefix <string>
-s, --suffix <string>
-j, --joins <string> set string joins each environments. defaults to " "
-f, --filepath <string> set env path. defaults to .env
docker run $(fdenv -p "-e ") helloworld