feat(automator): add json config

packages/vue-cli-plugin-uni/lib/configure-webpack.js

@@ -198,6 +198,20 @@ module.exports = function configureWebpack (platformOptions, manifestPlatformOpt
       plugins.push(new CopyWebpackPlugin(getCopyWebpackPluginOptions(manifestPlatformOptions, vueOptions)))
     }
 
+    plugins.push(new CopyWebpackPlugin([{
+      from: require.resolve('@dcloudio/uni-automator/dist/automator.json'),
+      to: '../.automator/' + (process.env.UNI_SUB_PLATFORM || process.env.UNI_PLATFORM) +
+        '/.automator.json',
+      transform (content) {
+        if (process.env.UNI_AUTOMATOR_WS_ENDPOINT) {
+          return JSON.stringify({
+            wsEndpoint: process.env.UNI_AUTOMATOR_WS_ENDPOINT
+          })
+        }
+        return ''
+      }
+    }]))
+
     if (process.UNI_SCRIPT_ENV && Object.keys(process.UNI_SCRIPT_ENV).length) {
       // custom define
       const envs = Object.create(null)