Don't forward body for GET/HEAD requests in proxy

Passing req.body (a ReadableStream) for GET requests could cause
the unix socket fetch to hang waiting for body data, especially
when the upstream toes proxy has already stripped content-length.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/server.ts

@@ -29,10 +29,12 @@ function proxyFetch(req: Request): Promise<Response> | Response {
       .catch(() => new Response('unhealthy', { status: 503 }))
   }
 
+  const hasBody = req.method !== 'GET' && req.method !== 'HEAD'
+
   return fetch(`http://localhost${url.pathname}${url.search}`, {
     method: req.method,
     headers: req.headers,
-    body: req.body,
+    body: hasBody ? req.body : undefined,
     unix: SOCKET_PATH,
   }).catch((e) => {
     console.error('Proxy error:', e)