Update Readme

Author: haoqunjiang

README.md

@@ -1,2 +1,9 @@
-# vue-cli-wiki
-A repository to make changes to the vue-cli Wiki on GitHub https://github.com/vuejs/vue-cli/wiki
+# Vue CLI Wiki
+
+[View the rendered version here]()(https://github.com/vuejs/vue-cli/wiki).
+
+---
+
+This repository automatically syncs to the wiki in `vuejs/vue-cli`. It is hosted separately here so that we can disable direct public edits but still accept public PRs.
+
+**If you want to make edits to the wiki, you should submit a PR here.**