mv backend/config/mysql.js.bk backend/config/mysql.js
mv backend/config/rsa.js.bk backend/config/rsa.js
mv frontend/src/config/rsa.js.bk frontend/src/config/rsa.js
mv frontend/src/config/url.js.bk frontend/src/config/url.js
and then modify these files.
init database
mysql -u<yourusername> -p<yourpassword> -D<yourdatabase> < database/init.sql
start backend
# cd backend
pm2 --name backend start npm -- run dev
start frontend
# cd frontend
pm2 --name frontend start npm -- run dev