add mkdocs build file

mkdocs.yml

@@ -0,0 +1,7 @@
+site_name: math-note
+site_description: 数学笔记
+site_url: http://math-note.yoqi.me/zh/
+theme:
+  name: material
+plugins:
+ - search

requirements.txt

@@ -0,0 +1,2 @@
+mkdocs 
+mkdocs-material