Koa Proxy Middleware

koa-proxy is an unmaintained proxy middleware specifically designed for Koa 2.x applications. It allows developers to proxy HTTP requests to a different host or URL, offering features like path mapping, regular expression-based matching for selective proxying, and control over request/response headers and cookie forwarding. Given its `1.0.0-alpha.3` version and last update several years ago, it is considered abandoned. This package predates modern JavaScript features like `async/await` and ESM, focusing on a synchronous middleware pattern and CommonJS module system. Its core functionality enables simple URL redirection and content serving from external sources within a Koa server.