larc

You can add individual lodash functions to your project. That's what we do to keep our Lambda's a little more lightweight.

https://www.npmjs.com/search?q=keywords:lodash-modularized

Obey the Testing Goat (http://www.obeythetestinggoat.com/) will take you through creating a small web app (python/django) using test driven development. The language choice may not match up with what you're using, but the concepts are useful across many domains. This book made a huge impact in how I think about writing tests, and in turn how I think about writing code.

Test Driven Development with Python (http://www.obeythetestinggoat.com/) teaches you to use Django and TDD practices to create a basic list web app.