Fetch configurations from Firestore's collection "configurations" as json files.

fetch.js

process.env.NODE_ENV = process.env.NODE_ENV ? process.env.NODE_ENV : 'development';
require('../src/firebase').admin.firestore().collection('configurations').get()
    .then(documents =>
        documents.forEach((document) =>
            require('fs').writeFile(`${require('../src/utils').baseDir}/config/${document.id}.json`, JSON.stringify(document.data()), (error) =>
                error ? console.error(error) : console.log(`Configuration file ${document.id}.json has been created!`))));