docs: fix README/website style problem

README.md

@@ -1,6 +1,6 @@
 # Tianji
 
-<img src="./public/icon.svg" width="128" />
+<img src="./website/static/img/logo.svg" width="128" />
 
 **Insight into everything**
 

README.zh.md

@@ -1,6 +1,6 @@
 # 天机 Tianji
 
-<img src="./public/icon.svg" width="128" />
+<img src="./website/static/img/logo.svg" width="128" />
 
 **洞察一切**
 

website/docusaurus.config.js

@@ -7,8 +7,7 @@ const darkCodeTheme = require('prism-react-renderer/themes/dracula');
 /** @type {import('@docusaurus/types').Config} */
 const config = {
   title: 'Tianji',
-  tagline:
-    'All-in-One Insight Hub',
+  tagline: 'All-in-One Insight Hub',
   favicon: 'img/favicon.ico',
 
   // Set the production url of your site here

website/postcss.config.js

@@ -0,0 +1,6 @@
+module.exports = {
+  plugins: {
+    tailwindcss: {},
+    autoprefixer: {},
+  },
+};