migration.js

db = new Mongo().getDB("kuadradodb");

adminname = _getEnv("MONGO_INITDB_NON_ROOT_USERNAME");
adminpwd = _getEnv("MONGO_INITDB_NON_ROOT_PASSWORD");

db.auth(adminname, adminpwd);

articles = db.getCollection("articles");

articles.update({},
    { $set: { "metadata": { "description": "" } } },
    { upsert: false, multi: true }
);