docs: add markdown lint config file

.markdownlint.json

@@ -0,0 +1,5 @@
+{
+  "default": true,
+  "MD033": false,
+  "MD013": false
+}

README.md

@@ -10,17 +10,20 @@
 
 - Build with react.js
 - PWA supported
-  <img src="demo/pwa.jpg" alt="PWA Logo" width="300">
+
+<img src="demo/pwa.jpg" alt="PWA Logo" width="300">
 
 - Responsive (Mobile First).
-  <img src="demo/m.png" alt="Mobile UI" width="300">
+
+<img src="demo/m.png" alt="Mobile UI" width="300">
 
 - Highlight the selected color
 - Classify the colors
 - Copy HEX
 - Add to favorites
 - Wallpaper (not stable, welcome [feedback](https://github.com/zerosoul/chinese-colors/issues)).
-  <img src="demo/screenshot.png" alt="screen shot" width="300">
+
+<img src="demo/screenshot.png" alt="screen shot" width="300">
 
 ## Technology Stack & Thanks
 

README.zh.md

@@ -1,6 +1,6 @@
-<img src="demo/logo.png" alt="Logo" width="50"> 中国传统颜色在线手册
+# <img src="demo/logo.png" alt="Logo" width="50"> 中国传统颜色在线手册
 
-# 中国传统颜色手册
+## 中国传统颜色手册
 
 [English Version](README.md)
 
@@ -12,17 +12,20 @@
 
 - 使用 React 构建
 - 支持 PWA
-  <img src="demo/pwa.jpg" alt="PWA Logo" width="300">
+
+<img src="demo/pwa.jpg" alt="PWA Logo" width="300">
 
 - 适配移动端展现 (Mobile First)
-  <img src="demo/m.png" alt="Mobile UI" width="300">
+
+<img src="demo/m.png" alt="Mobile UI" width="300">
 
 - 颜色选中高亮
 - 颜色分类
 - 可复制 HEX
 - 可收藏喜欢的颜色
 - 可生成壁纸，屏幕多大，截图就有多大 (暂不稳定，欢迎[反馈](https://github.com/zerosoul/chinese-colors/issues))。
-  <img src="demo/screenshot.png" alt="screen shot" width="300">
+
+<img src="demo/screenshot.png" alt="screen shot" width="300">
 
 ## 技术栈