fix: default to localhost on windows (close #221)

lib/dev.js

@@ -73,7 +73,13 @@ module.exports = async function dev (sourceDir, cliOptions = {}) {
   }
 
   const compiler = webpack(config)
-  const host = cliOptions.host || options.siteConfig.host || '0.0.0.0'
+  // webpack-serve hot updates doesn't work properly over 0.0.0.0 on Windows,
+  // but localhost does not allow visiting over network :/
+  const defaultHost = process.platform === 'win32' ? 'localhost' : '0.0.0.0'
+  const host = cliOptions.host || options.siteConfig.host || defaultHost
+  const displayHost = host === defaultHost && process.platform !== 'win32'
+    ? 'localhost'
+    : host
   portfinder.basePort = cliOptions.port || options.siteConfig.port || 8080
   const port = await portfinder.getPortPromise()
 
@@ -83,7 +89,7 @@ module.exports = async function dev (sourceDir, cliOptions = {}) {
       isFirst = false
       console.log(
         `\n  VuePress dev server listening at ${
-          chalk.cyan(`http://${host === '0.0.0.0' ? 'localhost' : host}:${port}${options.publicPath}`)
+          chalk.cyan(`http://${displayHost}:${port}${options.publicPath}`)
         }\n`
       )
     } else {