Use native esm

models/index.cjs

@@ -0,0 +1,32 @@
+const fs = require('fs');
+const path = require('path');
+const Sequelize = require('sequelize');
+
+const config = {
+  dialect: 'postgres',
+  protocol: 'postgres',
+  quoteIdentifiers: true,
+  logging: false,
+};
+
+const sequelize = new Sequelize(process.env.DATABASE_URL, config);
+const db = {};
+
+fs
+  .readdirSync(__dirname)
+  .filter(file => (file.indexOf('.') !== 0) && (file !== 'index.cjs'))
+  .forEach((file) => {
+    const model = sequelize.import(path.join(__dirname, file));
+    db[model.name] = model;
+  });
+
+Object.keys(db).forEach((modelName) => {
+  if ('associate' in db[modelName]) {
+    db[modelName].associate(db);
+  }
+});
+
+db.sequelize = sequelize;
+db.Sequelize = Sequelize;
+
+module.exports = db;