Lock down server IPC address (#51378)

This attempts to avoid IPv6 and IPv4 resolve issues across network
setups by locking down our internal IPC requests to just one address for
consistency. This way there aren't issues when `localhost` resolves to
one or the other in different cases.

x-ref: #49677

Author: ijjk

packages/next/src/server/lib/render-server.ts

@@ -137,6 +137,6 @@ export async function initialize(opts: {
         return reject(err)
       }
     })
-    server.listen(await getFreePort(), opts.hostname)
+    server.listen(await getFreePort(), '0.0.0.0')
   })
 }

packages/next/src/server/lib/server-ipc/index.ts

@@ -63,7 +63,7 @@ export async function createIpcServer(
   )
 
   const ipcPort = await new Promise<number>((resolveIpc) => {
-    ipcServer.listen(0, server.hostname, () => {
+    ipcServer.listen(0, '0.0.0.0', () => {
       const addr = ipcServer.address()
 
       if (addr && typeof addr === 'object') {

packages/next/src/server/lib/server-ipc/invoke-request.ts

@@ -18,8 +18,13 @@ export const invokeRequest = async (
       const http = require('http') as typeof import('http')
 
       try {
+        // force to 127.0.0.1 as IPC always runs on this hostname
+        // to avoid localhost issues
+        const parsedTargetUrl = new URL(targetUrl)
+        parsedTargetUrl.hostname = '127.0.0.1'
+
         const invokeReq = http.request(
-          targetUrl,
+          parsedTargetUrl.toString(),
           {
             headers: invokeHeaders,
             method: requestInit.method,