Easy lambdas with Netlify

Over the past years I’ve tried working with lambda functions on and off a couple of times. Each time I got stuck, either clicking in AWS UIs or writing YAML files.
Netlify changes all that by making lambdas easy to use. Below I’ll describe the basics of deploying a function, and I’ll show how the development tools support local development.
The most basic hello world example I could come up with can be found in this repo, tagged basic-javascript-lambda. There’s a simple index.html file (a left over from earlier experiments), and a hallo.js file in src/functions. That’s almost al there is to it, but it needs one specific bit of configuration in a file named netlify.toml, located in the root of the repository.
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