Default development hostname to 127.0.0.1

[Flaque]

Overview

This makes the default host for the development environment 127.0.0.1:3000 instead of *:3000, which better matches the output started server on http://localhost:3000.

It fixes #20137, as suggested by @rsms on twitter.

[ijjk]

Stats from current PR

Default Server Mode (Decrease detected ✓)

General Overall increase ⚠️

	vercel/next.js canary	getroomservice/next.js rs/local-conns	Change
buildDuration	8.8s	8.8s	⚠️ +27ms
nodeModulesSize	82.4 MB	82.4 MB	⚠️ +40 B

Page Load Tests Overall decrease ⚠️

	vercel/next.js canary	getroomservice/next.js rs/local-conns	Change
/ failed reqs	0	0	✓
/ total time (seconds)	2.014	2.047	⚠️ +0.03
/ avg req/sec	1241.16	1221.2	⚠️ -19.96
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	1.091	1.1	⚠️ +0.01
/error-in-render avg req/sec	2291.46	2272.49	⚠️ -18.97

Client Bundles (main, webpack, commons)

	vercel/next.js canary	getroomservice/next.js rs/local-conns	Change
677f882d2ed8..0679.js gzip	12.8 kB	12.8 kB	✓
framework.HASH.js gzip	39 kB	39 kB	✓
main-b992ce4..2479.js gzip	6.56 kB	6.56 kB	✓
webpack-95c2..e870.js gzip	751 B	751 B	✓
Overall change	59.1 kB	59.1 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	getroomservice/next.js rs/local-conns	Change
polyfills-d3..23f6.js gzip	31 kB	31 kB	✓
Overall change	31 kB	31 kB	✓

Client Pages

	vercel/next.js canary	getroomservice/next.js rs/local-conns	Change
_app-0d19cb6..5497.js gzip	1.28 kB	1.28 kB	✓
_error-2cf0e..a0a0.js gzip	3.69 kB	3.69 kB	✓
hooks-42456f..0c06.js gzip	887 B	887 B	✓
index-8081ce..e44f.js gzip	227 B	227 B	✓
link-0ab9f83..fa00.js gzip	1.61 kB	1.61 kB	✓
routerDirect..c3d8.js gzip	303 B	303 B	✓
withRouter-0..a68e.js gzip	302 B	302 B	✓
Overall change	8.31 kB	8.31 kB	✓

Client Build Manifests

	vercel/next.js canary	getroomservice/next.js rs/local-conns	Change
_buildManifest.js gzip	323 B	323 B	✓
Overall change	323 B	323 B	✓

Rendered Page Sizes

	vercel/next.js canary	getroomservice/next.js rs/local-conns	Change
index.html gzip	615 B	615 B	✓
link.html gzip	620 B	620 B	✓
withRouter.html gzip	608 B	608 B	✓
Overall change	1.84 kB	1.84 kB	✓

---

Serverless Mode

General Overall increase ⚠️

	vercel/next.js canary	getroomservice/next.js rs/local-conns	Change
buildDuration	10.2s	10.2s	⚠️ +1ms
nodeModulesSize	82.4 MB	82.4 MB	⚠️ +40 B

Client Bundles (main, webpack, commons)

	vercel/next.js canary	getroomservice/next.js rs/local-conns	Change
677f882d2ed8..0679.js gzip	12.8 kB	12.8 kB	✓
framework.HASH.js gzip	39 kB	39 kB	✓
main-b992ce4..2479.js gzip	6.56 kB	6.56 kB	✓
webpack-95c2..e870.js gzip	751 B	751 B	✓
Overall change	59.1 kB	59.1 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	getroomservice/next.js rs/local-conns	Change
polyfills-d3..23f6.js gzip	31 kB	31 kB	✓
Overall change	31 kB	31 kB	✓

Client Pages

	vercel/next.js canary	getroomservice/next.js rs/local-conns	Change
_app-0d19cb6..5497.js gzip	1.28 kB	1.28 kB	✓
_error-2cf0e..a0a0.js gzip	3.69 kB	3.69 kB	✓
hooks-42456f..0c06.js gzip	887 B	887 B	✓
index-8081ce..e44f.js gzip	227 B	227 B	✓
link-0ab9f83..fa00.js gzip	1.61 kB	1.61 kB	✓
routerDirect..c3d8.js gzip	303 B	303 B	✓
withRouter-0..a68e.js gzip	302 B	302 B	✓
Overall change	8.31 kB	8.31 kB	✓

Client Build Manifests

	vercel/next.js canary	getroomservice/next.js rs/local-conns	Change
_buildManifest.js gzip	323 B	323 B	✓
Overall change	323 B	323 B	✓

Serverless bundles

	vercel/next.js canary	getroomservice/next.js rs/local-conns	Change
_error.js	1 MB	1 MB	✓
404.html	2.67 kB	2.67 kB	✓
hooks.html	1.92 kB	1.92 kB	✓
index.js	1 MB	1 MB	✓
link.js	1.06 MB	1.06 MB	✓
routerDirect.js	1.05 MB	1.05 MB	✓
withRouter.js	1.05 MB	1.05 MB	✓
Overall change	5.16 MB	5.16 MB	✓

Commit: e9591b8

[ijjk]

Failing test suites

Commit: e9591b8

test/integration/dist-dir/test/index.test.js

• distDir > should handle null/undefined distDir

Expand output

● distDir › should handle null/undefined distDir

expect(received).toBe(expected) // Object.is equality

Expected: 0
Received: 106

  63 |     await fs.writeFile(nextConfig, origNextConfig)
  64 | 
> 65 |     expect(stderr.length).toBe(0)
     |                           ^
  66 |   })
  67 | })
  68 | 

  at Object.<anonymous> (integration/dist-dir/test/index.test.js:65:27)

[timneutkens]

Going to close this in favor of #20409. Thanks for the PR!