b6f03f9efb
- Add toml crate dependency for TOML file parsing - Create config module with Config struct to deserialize config.toml - Support OIDC URLs (auth_url, token_url, redirect_url), credentials (client_id, client_secret) - Make server host/port, database URL, and session secret configurable - Create config.example.toml with all configuration options documented - Update main.rs to load config.toml with fallback to environment variables - Maintain backward compatibility with environment variable configuration