Best Way to Run an Executable in a Docker Container?

It sounds like you're trying to run both the front-end and back-end in the same container, which can be tricky. Ideally, you want to have separate containers for each service: one for Traefik, one for the front-end, and another for the back-end. This isolates each process and reduces conflicts. You can still manage them all together with a single docker-compose file, just make sure to define the dependencies. Also, ensure that your backend service is accessible to the front-end by properly defining network configurations.

While it's possible to run the front-end and back-end within the same container, it’s often better to separate them. If you want to stick with this setup, make sure your backend executable is designed to stay running (like a server) rather than exiting immediately. Also, check that you're specifying the correct ports and that the backend is listening on the expected port. If Traefik can't reach the backend, it'll throw a 502 error, which usually means your backend isn't responding as expected.

Have you considered creating a Dockerfile for your application? This way, you can fine-tune the build and entrypoint scripts. You could also set up your backend to run in the background while keeping your Apache service active. It might also help to add logging to your backend to see if it’s starting correctly. If it’s not listening on the expected port, Traefik won’t be able to route requests properly.