🚩 for Node versions since v12.12, there is an easier and better solution.
I recently got this working in my express app. Steps as follows:
Install the required library:
npm install --save-dev source-map-support
In your entry point (eg app.ts):
require('source-map-support').install();
In your app.ts, you may also require better logging for errors within promises:
process.on('unhandledRejection', console.log);
In your tsconfig, under compilerOptions:
"inlineSourceMap": true