Packaging white screen problem reference: https://blog.csdn.net/u010212601/article/details/82350252
Mobile phone physical back button problem reference: https://blog.csdn.net/brake_lzk/article/details/80678567
npm run build reported the following error
Solution: npm i webpack-cli -g
Solution for the background picture not coming out after packaging: refer to https://blog.csdn.net/qq_26422747/article/details/80599364
