feature:

引入react-fontawesome，升级至v5.15;
next/link补齐passHref;
替换img为next/Image,优化图片

components/ContactButton.js

@@ -1,5 +1,7 @@
 import React from 'react'
 import Link from 'next/link'
+import { FontAwesomeIcon } from '@fortawesome/react-fontawesome'
+import { faInfo } from '@fortawesome/free-solid-svg-icons'
 
 /**
  * 悬浮在屏幕右下角,联系我的按钮
@@ -12,7 +14,7 @@ const ContactButton = () => {
       <a className={'fixed right-10 bottom-40 animate__fadeInRight animate__animated animate__faster'}>
       <span
         className='dark:bg-black bg-white px-5 py-3 cursor-pointer shadow-card text-xl hover:bg-blue-500 transform duration-200 hover:text-white hover:shadow'>
-        <span className='dark:text-gray-200 fa fa-info' title='about' />
+        <FontAwesomeIcon icon={faInfo} className='dark:text-gray-200 ' title='about' />
       </span>
       </a>
     </Link>