`yarn build` was crashing on my `build-cached-data` script, because we were trying to run the Typescript file uncompiled!
Now, we run it with `ts-node`, which transparently compiles Typescript files before execution. Phew!
`react-scripts build` made some automated changes to `tsconfig.json` for compatibility with `create-react-app`, and I also added a `ts-node` section to override one of them so we can compile to CommonJS for `ts-node` script execution!
