How do I troubleshoot my Node.js application running in Docker?

I'm having issues with my Node.js app running in Docker. It keeps crashing. What should I do?

First, check the logs of your Docker container using docker logs <container_id>. This will help identify the error.

I checked the logs, and it says 'Cannot find module'. What does that mean?

This error usually means that a required module is not installed. Make sure to run npm install in your Dockerfile or check your package.json.

I added the module to my package.json, but it still doesn't work. Any other suggestions?

Ensure that your Dockerfile is set up to copy your package.json and run npm install before starting the app. Also, try rebuilding the image with docker-compose build.