fix: use correct host in tip after the server has started (vuejs#130)

Author: wangyi7099

lib/dev.js

@@ -73,6 +73,7 @@ module.exports = async function dev (sourceDir, cliOptions = {}) {
  }
 
  const compiler = webpack(config)
+ const host = cliOptions.host || options.siteConfig.host || '0.0.0.0'
  portfinder.basePort = cliOptions.port || options.siteConfig.port || 8080
  const port = await portfinder.getPortPromise()
 
@@ -82,7 +83,7 @@ module.exports = async function dev (sourceDir, cliOptions = {}) {
  isFirst = false
  console.log(
  `\n VuePress dev server listening at ${
- chalk.cyan(`http://localhost:${port}${options.publicPath}`)
+ chalk.cyan(`http://${host}:${port}${options.publicPath}`)
  }\n`
  )
  } else {
@@ -97,7 +98,7 @@ module.exports = async function dev (sourceDir, cliOptions = {}) {
  // in cwd it would break the server
  content: [nonExistentDir],
  compiler,
- host: cliOptions.host || options.siteConfig.host || '0.0.0.0',
+ host,
  dev: { logLevel: 'warn' },
  hot: { logLevel: 'error' },
  logLevel: 'error',