docs: update web pages navigation

For a better reading, please visit https://doocs.github.io/advanced-java.
Welcome to join Doocs Open Source organization, see https://github.com/doocs for details.

_coverpage.md

@@ -2,7 +2,8 @@
 
 # Java 进阶扫盲
 
-> 高并发 分布式 高可用
+> 高并发 分布式 高可用 微服务
 
-[GitHub](https://github.com/doocs/advanced-java/)
+[Doocs](https://github.com/doocs/intro)
+[GitHub](https://github.com/doocs/yanglbme/)
 [Get Started](#互联网-java-工程师进阶知识完全扫盲)

_navbar.md

@@ -2,9 +2,11 @@
   * [高并发](/README#高并发架构)
   * [分布式](/README#分布式系统)
   * [高可用](/README#高可用架构)
+  * [微服务](/README#微服务架构)
 
 * 页面
   * [封面]()
   * [首页](README)
-  * [GitHub](https://github.com/yanglbme)
-  * [Offer](offer)
+  * [Offer](offer)
+  * [Doocs](https://github.com/doocs/intro)
+  * [GitHub](https://github.com/yanglbme)  

index.html

@@ -29,7 +29,7 @@
           var footer = [
             '<hr/>',
             '<footer>',
-            '<span>Copyright © 2018-2019 <a href="https://github.com/yanglbme" target="_blank">yanglbme</a>. All rights reserved.</span>',
+            '<span>Copyright © 2018-2019 <a href="https://github.com/yanglbme" target="_blank">yanglbme</a>. All rights reserved.</span><br>Welcome to join <a href="https://github.com/doocs/intro" target="_blank">Doocs Open Source organization</a>.',
             '</footer>'
           ].join('')