- Introduced a new `dashboard` frontend in HAProxy configuration to serve a real-time monitoring dashboard.
- Added support for returning prebuilt `dashboard.html` for `/` or `/index.html` paths.
- Updated test cases and expected outputs to accommodate the new frontend.
- Refactored HAProxy configuration files, templates, and paths to use `/etc/easyhaproxy` instead of `/etc/haproxy`.
- Updated Dockerfile to generate DH params and placeholder certificates in the new configuration directory.
- Added health check support with timeout to `DockerComposeFixture` in E2E test utilities.
- Adjusted tests, templates, and plugins to use the new `Consts`-based configuration paths.
- Introduced pytest fixtures for environment isolation and temporary directory management.
