fix(build): `--minify` not working as documented

closes #4523

src/node/build/bundle.ts

@@ -88,13 +88,7 @@ export async function bundle(
       ssr,
       ssrEmitAssets: config.mpa,
       // minify with esbuild in MPA mode (for CSS)
-      minify: ssr
-        ? config.mpa
-          ? 'esbuild'
-          : false
-        : typeof options.minify === 'boolean'
-          ? options.minify
-          : !process.env.DEBUG,
+      minify: ssr ? !!config.mpa : (options.minify ?? !process.env.DEBUG),
       outDir: ssr ? config.tempDir : config.outDir,
       cssCodeSplit: false,
       rollupOptions: {

src/node/cli.ts

@@ -12,6 +12,14 @@ if (process.env.DEBUG) {
 
 const argv: any = minimist(process.argv.slice(2))
 
+Object.keys(argv).forEach((key) => {
+  if (argv[key] === 'true') {
+    argv[key] = true
+  } else if (argv[key] === 'false') {
+    argv[key] = false
+  }
+})
+
 const logVersion = (logger: Logger) => {
   logger.info(`\n  ${c.green(`${c.bold('vitepress')} v${version}`)}\n`, {
     clear: !logger.hasWarned