add product model and seed script

cli/lib/fetch_products.js

@@ -0,0 +1,10 @@
+/* eslint-disable no-console */
+const products = require('./mock_products');
+
+function fetchProducts(count = 1) {
+  console.log('Seeding products from JSON');
+
+  return Promise.resolve(products.slice(0, count));
+}
+
+module.exports = fetchProducts;