The default port number of the vue cli project is 8080, and the running command isnpm run serve
You can modify the running command in package.json, change the serve to dev, you can use the npm run devrunning project to
modify the running port number, you need to find the @vue folder in node_modules, there is a cli-service folder inside, and find the lib folder, commands folder, find the serve.js folder.
Sequence: node_modules --> @vue --> cli-service --> lib --> commands --> serve.js
Find defaults in the serve.js folder, modify the port to set the port number
