[doc] Readme

README.md

@@ -16,6 +16,9 @@ sudo apt-get update
 sudo apt-get upgrade
 sudo apt-get install cmake g++ gcc
 sudo apt-get install python3-pip python3-dev portaudio19-dev libsndfile1
+
+# wifi hotspot
+sudo pip install flask
 ```
 
 #### (2) 克隆项目到本地并安装依赖：
@@ -24,7 +27,7 @@ sudo apt-get install python3-pip python3-dev portaudio19-dev libsndfile1
 // 克隆项目到本地 https or ssh
 git clone http://43.132.157.186:3000/gaohz/TakwayBoard.git
 cd TakwayBoard
-pip install -v -e .
+sudo pip install -v -e .
 ```
 
 #### (3) 安装板载端环境依赖：