Chunk 2 is complete — and this was by far the most challenging and rewarding part of the challenge so far. In this post I'm documenting exactly how I built the serverless visitor counter backend : Lambda, DynamoDB, API Gateway , and the bugs I encountered along the way. The debugging section is the most valuable part, so I've kept it honest and detailed. What is Chunk 2 about? The goal is to build a serverless API that: Stores a visitor count in a database Incremen...