Most serverless tutorials stop at a hello-world Lambda behind API Gateway. I wanted the opposite: build one real product end to end, run every command on real AWS, and write down the actual numbers — including the ones that didn't go as planned. The result is a 21-article series that builds a URL shortener with realtime click analytics , fully serverless, and takes it to production: auth, multi-tenancy, an event pipeline, realtime push, observability, CI/CD with canary deploys, a cost breakdown, and a load test. Code: github.com/nghiadaulau/serverless-url-shortener-aws .…