docs: add configuration management commands to README

- Document the useful show-config.js script and related npm scripts
- Add section explaining bun run config, config:env, config:help commands
- These commands help developers understand the unified configuration system
- Script is functional and well-integrated, so keeping it and making it more discoverable

README.md

@@ -167,6 +167,20 @@ make docker-clean    # Clean Docker resources
 make info            # Show project information
 ```
 
+### **Configuration Management**
+
+The app uses a unified configuration system with smart defaults. You can view and understand the current configuration:
+
+```bash
+# View current configuration
+bun run config              # Show current unified config
+bun run config:env          # Show as environment variables
+bun run config:help         # Show configuration help
+
+# Or use the script directly
+bun show-config.js          # Same as bun run config
+```
+
 ### **Environment Configuration**
 
 The app uses a unified configuration system with smart defaults: