[Pages] move screenshots/ to docs/

Signed-off-by: Eric Wang <skygragon@gmail.com>

Author: skygragon

README.md

@@ -27,11 +27,11 @@ Great thanks to leetcode.com, a really awesome website!
 
 `help`/`user`/`list`/`show`/`test`
 
-<img src="https://github.com/skygragon/leetcode-cli/blob/master/screenshots/intro.gif" />
+<img src="https://skygragon.github.io/leetcode-cli/screenshots/intro.gif" />
 
 `test`/`submit`/`stat`/`submission`
 
-<img src="https://github.com/skygragon/leetcode-cli/blob/master/screenshots/intro2.gif" />
+<img src="https://skygragon.github.io/leetcode-cli/screenshots/intro2.gif" />
 
 ## Quick Start
 

docs/demo.html

@@ -0,0 +1,8 @@
+---
+layout: default
+title: Showcases
+---
+<center>
+  <img src="./screenshots/intro.gif"></img>
+  <img src="./screenshots/intro2.gif"></img>
+</center>

docs/index.html

@@ -10,6 +10,7 @@
 </style>
 <center>
   <a href="./install" class="btn btn-clear">Installation</a>
-  <a href="./commands" class="btn btn-clear">Commands Tutorials</a>
+  <a href="./demo.html" class="btn btn-clear">Showcases</a>
+  <a href="./commands" class="btn btn-clear">Commands</a>
   <a href="./advanced" class="btn btn-clear">Advanced Tips</a>
 </center>