docs: update configs, fix doocs#6

Update configs
Fix doocs#6
Add issues button

Author: yanglbme

README.md

@@ -4,6 +4,7 @@
 [![original](https://img.shields.io/badge/original-%E4%B8%AD%E5%8D%8E%E7%9F%B3%E6%9D%89-orange.svg)](https://github.com/doocs/advanced-java)
 [![stars](https://img.shields.io/github/stars/doocs/advanced-java.svg)](https://github.com/doocs/advanced-java/stargazers)
 [![forks](https://img.shields.io/github/forks/doocs/advanced-java.svg)](https://github.com/doocs/advanced-java/network/members)
+[![issues](https://img.shields.io/github/issues/doocs/advanced-java.svg)](https://github.com/doocs/advanced-java/issues)
 [![PRs Welcome](https://img.shields.io/badge/PRs-Welcome-brightgreen.svg)](http://makeapullrequest.com)
 
 本系列知识出自中华石杉，我对这部分知识做了一个系统的整理，方便学习查阅。By the way，微信公众号**石杉的架构笔记**（id:shishan100）有其它很多架构知识，墙裂推荐~
@@ -27,7 +28,7 @@
 - [es 在数据量很大的情况下（数十亿级别）如何提高查询效率啊？](/docs/high-concurrency/es-optimizing-query-performance.md)
 - [es 生产集群的部署架构是什么？每个索引的数据量大概有多少？每个索引大概有多少个分片？](/docs/high-concurrency/es-production-cluster.md)
 
-### [缓存](/docs/high-concurrency/why-cache.md)
+### 缓存
 - [在项目中缓存是如何使用的？缓存如果使用不当会造成什么后果？](/docs/high-concurrency/why-cache.md)
 - [Redis 和 Memcached 有什么区别？Redis 的线程模型是什么？为什么单线程的 Redis 比多线程的 Memcached 效率要高得多？](/docs/high-concurrency/redis-single-thread-model.md)
 - [Redis 都有哪些数据类型？分别在哪些场景下使用比较合适？](/docs/high-concurrency/redis-data-types.md)

index.html

@@ -22,10 +22,7 @@
       coverpage: true,
       mergeNavbar: true,
       search: [
-        '/',            // => /README.md
-        '/guide',       // => /guide.md
-        '/get-started', // => /get-started.md
-        '/zh-cn/'       // => /zh-cn/README.md
+        '/'            // => /README.md
       ],
       plugins: [
         function (hook) {
@@ -48,7 +45,7 @@
     }
 
   </script>
-  <script src="//unpkg.com/docsify"></script>
+  <!-- <script src="//unpkg.com/docsify"></script> -->
   <script src="//unpkg.com/docsify/lib/docsify.min.js"></script>
   <script src="//unpkg.com/prismjs/components/prism-c.min.js"></script>
   <script src="//unpkg.com/prismjs/components/prism-bash.min.js"></script>