- **Description:** Setup and manage environment configuration - **Activities:** - Create .env files for different environments (dev, staging, production) - Configure API base URLs for each environment - Setup feature flags and configuration management - Implement environment-specific build configurations - Create secure configuration handling - Setup build-time variable substitution - Document environment setup and deployment configs - Create configuration validation system - Implement dynamic configuration loading if needed - Setup configuration for third-party services - **Deliverables:** Environment configuration system, .env templates, configuration documentation