Update README: Instructions to Run with Docker alongside other services.

Update the README to provide clear instructions for running this service with Docker in conjunction with the full operations stack. The steps should be:

1. Follow the steps described in the [operations/docker](https://github.com/Evolutionary-Algorithms-On-Click/operations/tree/main/docker) directory to launch all services in the operations stack with Docker Compose.
2. Once all services are up, stop the container (or service) corresponding to `runner_controller_microservice`.
3. Use the Docker Compose file provided in this repository (`runner_controller_microservice`) to launch an updated version of this microservice, making sure to set any required environment variables so it can communicate properly with the other stack services.
4. Ensure the new instance integrates seamlessly with the rest of the running stack.
5. Document any additional or changed environment variables, networking considerations, or ports needed for integration.

This update will help users cleanly upgrade or develop on top of runner_controller_microservice without redeploying the full stack.

Commencez par le README du dépôt et le fichier Docker Compose de runner_controller_microservice, puis comparez-les aux instructions de operations/docker pour lancer la stack complète. Documentez comment arrêter le runner_controller_microservice existant, lancer la version de ce dépôt et configurer les variables d’environnement, le réseau et les ports requis. La tâche est terminée lorsque le README décrit un processus de mise à niveau reproductible qui s’intègre à la stack en cours d’exécution.

Rédigé par le modèle d'indexation à partir du texte de l'issue.