[improvement] rename docs/src to docs/site (#3660)

docs/site/index.js

@@ -0,0 +1,41 @@
+import Vue from 'vue';
+import VueRouter from 'vue-router';
+import VantDoc from '@vant/doc';
+import App from './DocsApp';
+import routes from './router';
+import { isMobile, importAll } from './utils';
+
+if (isMobile) {
+  location.replace('mobile.html' + location.hash);
+}
+
+Vue.use(VueRouter).use(VantDoc);
+
+const docs = {};
+const docsFromMarkdown = require.context('../markdown', false, /(en-US|zh-CN)\.md$/);
+const docsFromPackages = require.context('../../src', true, /(en-US|zh-CN)\.md$/);
+
+importAll(docs, docsFromMarkdown);
+importAll(docs, docsFromPackages);
+
+const router = new VueRouter({
+  mode: 'hash',
+  routes: routes({ componentMap: docs })
+});
+
+router.afterEach(() => {
+  window.scrollTo(0, 0);
+  Vue.nextTick(() => window.syncPath());
+});
+
+window.vueRouter = router;
+
+if (process.env.NODE_ENV !== 'production') {
+  Vue.config.productionTip = false;
+}
+
+new Vue({
+  el: '#app',
+  render: h => h(App),
+  router
+});