Document --host and --port flag for preview

[bluwy]

Changes

Ref: #9133 (comment)

We support those flags for all adapters as we collect them here

astro/packages/astro/src/core/preview/index.ts

Lines 20 to 22 in e496b2e

	export default async function preview(inlineConfig: AstroInlineConfig): Promise<PreviewServer> {
	const logger = createNodeLogger(inlineConfig);
	const { userConfig, astroConfig } = await resolveConfig(inlineConfig ?? {}, 'preview');

And then pass them to adapters at:

astro/packages/astro/src/core/preview/index.ts

Lines 59 to 68 in e496b2e

	const server = await previewModule.default({
	outDir: settings.config.outDir,
	client: settings.config.build.client,
	serverEntrypoint: new URL(settings.config.build.serverEntry, settings.config.build.server),
	host: getResolvedHostForHttpServer(settings.config.server.host),
	port: settings.config.server.port,
	base: settings.config.base,
	logger: new AstroIntegrationLogger(logger.options, settings.adapter.name),
	});

Testing

Tested manually in the examples app:

> @example/ssr@0.0.1 preview /Users/bjorn/Work/oss/astro/examples/ssr
> astro preview "--port" "4444" "--host"

15:54:49 [@astrojs/node] Preview server listening on 
  local: http://localhost:4444 
  network: http://192.168.68.55:4444

> @example/basics@0.0.1 preview /Users/bjorn/Work/oss/astro/examples/basics
> astro preview "--port" "4444" "--host"


 astro  v4.0.8 ready in 5 ms

┃ Local    http://localhost:4444/
┃ Network  http://192.168.68.55:4444/

Docs

Looks like it's only documented for astro dev: https://docs.astro.build/en/reference/cli-reference/#astro-dev

It should be updated.

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