In webpack.*.js add webpack.DefinePlugin call with the process.env definition
plugins: [
new webpack.HotModuleReplacementPlugin(),
new webpack.NamedModulesPlugin(),
new webpack.DefinePlugin({
"process.env": {
API_MOVIES_URL: '"http://localhost:3000"'
}
}),
]
export const settings = {
API_Movies_URL: process.env['API_MOVIES_URL'],
}