Fix volume binding

[jorisvilardell]

This pull request involves significant changes to the Docker volume management and related code cleanup. The main changes include the addition of volume definitions in the docker-compose.yml file and the removal of the ensure_volumes function and its related code from the Rust application.

Docker volume management:

• Added volume definitions for prometheus_data, nephelios_data, registry_data, grafana_data, grafana_provisioning, and grafana_dashboard in the docker-compose.yml file.

Code cleanup:

• Removed the ensure_volumes function and its invocation in src/main.rs. This includes the removal of the call to ensure_volumes in the main function and the corresponding import statement. [1] [2]
• Deleted the ensure_volumes function and the NepheliosVolume struct from src/services/helpers/docker_helper.rs. [1] [2]