UI5 Simple Proxy Middleware

ui5-middleware-simpleproxy is a middleware for the UI5 Tooling ecosystem, specifically designed to integrate with `@ui5/server`. It provides a simple HTTP and WebSocket proxying capability for UI5 applications during development. Currently at stable version 3.7.0, it follows the UI5 CLI's major versioning for compatibility, requiring `@ui5/cli@3.0.0` or higher for its 3.x releases. The package allows developers to configure a base URI, handle SSL certificates, manage HTTP headers and query parameters, and define exclusion patterns directly within their `ui5.yaml` file. A key differentiator is its straightforward configuration via YAML and environment variables, providing a flexible solution for connecting local UI5 development servers to backend services, including support for basic authentication and optional ETag removal. It's a fundamental tool for managing backend communication in UI5 local development setups.