chore: yarn -> npm (with 淘宝源)

Author: upupming

.github/workflows/ci.yml

@@ -2,7 +2,7 @@ name: Build
 on: [push, pull_request]
 jobs:
   build:
-    runs-on: linux-latest
+    runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v2
@@ -11,11 +11,11 @@ jobs:
 
       - name: Building Frontend
         run: |
-          yarn global add lerna
-          yarn
+          npm i -g lerna
+          npm i
           lerna bootstrap
           cd frontend
-          yarn build
+          npm run build
 
       - name: Publish Frontend to Github Pages
         uses: peaceiris/actions-gh-pages@v3

.npmrc

@@ -0,0 +1 @@
+registry = 'https://registry.npm.taobao.org/'

README.md

@@ -5,12 +5,12 @@
 前后端放在一个仓库里面，使用 [lerna](https://github.com/lerna/lerna) 统一管理。你需要全局安装 lerna：
 
 ```bash
-yarn global add lerna
+npm i -g lerna
 ```
 
 ```bash
 # 安装根目录依赖
-yarn
+npm i
 # 自动前后端所有依赖
 lerna bootstrap
 ```
@@ -19,10 +19,10 @@ lerna bootstrap
 
 ```bash
 cd frontend
-yarn start
+npm run start
 ```
 
-存放于文件夹 [frontend](frontend)。
+存放于文件夹 [frontend](frontend)，自动部署网址位于 。
 
 - React
 - React Router

backend/package-lock.json

@@ -1,5 +1,5 @@
 {
-  "name": "bd7",
+  "name": "bd7-backend",
   "version": "1.0.0",
   "description": "BD7",
   "author": "techtrainingcamp-frontend-7",