更新README

README.md

@@ -2,7 +2,9 @@
 
 这是课程中所有项目的主要存储库。
 
-- [课程链接](https://study.jonylee.top/50+js-css-html/)
+- [课程国内自建链接](https://study.jonylee.top/50+js-css-html/)
+
+- [原始课程链接](https://www.traversymedia.com/50-Projects-In-50-Days)
 
 | # | 项目中文说明     | 项目代码链接                                                                                                                        | 在线预览                                                                         |
 | :-: | ---------------- | ----------------------------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------- |
@@ -57,3 +59,27 @@
 | 49 | Todo列表         | [Todo List](https://gitea.jonylee.top/caojiezi2003/50projects50days/src/branch/master/todo-list)                                       | [Live Demo](https://study.jonylee.top/50+js-css-html/todo-list/)                    |
 | 50 | 捉虫游戏         | [Insect Catch Game](https://gitea.jonylee.top/caojiezi2003/50projects50days/src/branch/master/insect-catch-game)                       | [Live Demo](https://study.jonylee.top/50+js-css-html/insect-catch-game/)            |
 | 51 | 简单计时器       | [Simple Timer](https://gitea.jonylee.top/caojiezi2003/50projects50days/src/branch/master/simple-timer)                                 | [Live Demo](https://study.jonylee.top/50+js-css-html/simple-timer/)                 |
+
+## License
+
+The MIT License
+
+Copyright (c) 2020-2021 Traversy Media https://traversymedia.com
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.