fix: revert regression of port computation (#12197)

* fix: revert regression of port computation

* revert tests failing

* address feedback

* revert logic to how it was before

Author: ematipico

.changeset/tidy-dancers-act.md

@@ -0,0 +1,5 @@
+---
+'astro': patch
+---
+
+Fix a regression where a port was incorrectly added to the `Astro.url`

packages/astro/src/core/app/node.ts

@@ -83,13 +83,12 @@ export class NodeApp extends App {
 		const hostname = forwardedHostname ?? req.headers.host ?? req.headers[':authority'];
 
 		// @example "443,8080,80" => "443"
-		const forwardedPort = getFirstForwardedValue(req.headers['x-forwarded-port']);
-		const port =
-			forwardedPort ?? req.socket?.remotePort?.toString() ?? (isEncrypted ? '443' : '80');
+		const port = getFirstForwardedValue(req.headers['x-forwarded-port']);
 
 		const portInHostname = typeof hostname === 'string' && /:\d+$/.test(hostname);
-		const hostnamePort = portInHostname ? hostname : `${hostname}:${port}`;
-
+		const hostnamePort = portInHostname ? hostname : `${hostname}${port ? `:${port}` : ''}`;
+		
+		
 		const url = `${protocol}://${hostnamePort}${req.url}`;
 		const options: RequestInit = {
 			method: req.method || 'GET',