If you’re using Docker Compose to run your app, you can use Subtrace to monitor all of your backend requests. Here’s how you can get started:
1

Make the following change to your Dockerfile to install and use Subtrace in your app’s Docker image:
- CMD ["node", "./app.js"]
+ RUN curl -fsSL https://subtrace.dev/install.sh | sh
+ CMD ["subtrace", "run", "--", "node", "./app.js"]
2

Add the following lines to your service’s definition in your compose.yaml file:
cap_add:
  - SYS_PTRACE
3

Start your app as you normally would:
4

That’s it! Open the subt.link URL in your browser to see your app’s requests show up in real time:
It’s possible that the subt.link URL is printed from within a container.