add compact property when the user run pnpm run build

packages/astro/src/@types/astro.ts

@@ -426,6 +426,23 @@ export interface AstroUserConfig {
 	 */
 	site?: string;
 
+
+	/**
+	 * @docs
+	 * @name compact
+	 * @type {boolean}
+	 * @default `true`
+	 * @description
+	 * Set to `true` to enable compact mode. This will remove all whitespace from your final HTMl file, including newlines. This is useful for reducing the size of your final build html bundle
+	 *
+	 * ```js
+	 * {
+	 *   compact: true
+	 * }
+	 * ```
+	 */
+	compact?: boolean;
+
 	/**
 	 * @docs
 	 * @name base

packages/astro/src/core/compile/compile.ts

@@ -37,6 +37,7 @@ export async function compile({
 		// use `sourcemap: "both"` so that sourcemap is included in the code
 		// result passed to esbuild, but also available in the catch handler.
 		transformResult = await transform(source, {
+			compact: astroConfig.compact,
 			filename,
 			normalizedFilename: normalizeFilename(filename, astroConfig.root),
 			sourcemap: 'both',

packages/astro/src/core/config/schema.ts

@@ -22,6 +22,7 @@ const ASTRO_CONFIG_DEFAULTS: AstroUserConfig & any = {
 		assets: '_astro',
 		serverEntry: 'entry.mjs',
 	},
+	compact: true,
 	server: {
 		host: false,
 		port: 3000,
@@ -62,6 +63,7 @@ export const AstroConfigSchema = z.object({
 		.default(ASTRO_CONFIG_DEFAULTS.outDir)
 		.transform((val) => new URL(val)),
 	site: z.string().url().optional(),
+	compact: z.boolean().optional().default(ASTRO_CONFIG_DEFAULTS.compact),
 	base: z.string().optional().default(ASTRO_CONFIG_DEFAULTS.base),
 	trailingSlash: z
 		.union([z.literal('always'), z.literal('never'), z.literal('ignore')])
@@ -197,6 +199,10 @@ export function createRelativeSchema(cmd: string, fileProtocolRoot: URL) {
 			.string()
 			.default(ASTRO_CONFIG_DEFAULTS.srcDir)
 			.transform((val) => new URL(appendForwardSlash(val), fileProtocolRoot)),
+		compact: z
+			.boolean()
+			.optional()
+			.default(ASTRO_CONFIG_DEFAULTS.compact),
 		publicDir: z
 			.string()
 			.default(ASTRO_CONFIG_DEFAULTS.publicDir)