refactor: [#14] move configuration files to infrastructure layer

- Remove application/.env.production (now in infrastructure/config/environments/)
- Remove application/share/container/default/config/prometheus.yml (now generated by infrastructure)
- Remove application/share/container/default/config/tracker.prod.container.sqlite3.toml (now generated by infrastructure)

This completes the 12-factor app refactoring by moving configuration generation
to the infrastructure layer, making the application layer purely focused on
runtime deployment.

Author: josecelano