mac vue 安装不成功

npm i vue,npm i vue -g,sudo npm i vue都不行。

npm WARN saveError ENOENT: no such file or directory, open '/Users/apple/package.json'

npm WARN enoent ENOENT: no such file or directory, open '/Users/apple/package.json'

npm WARN apple No description

npm WARN apple No repository field.

npm WARN apple No README data

npm WARN apple No license field.

+ vue@2.5.21

updated 1 package and audited 1 package in 1.25s

found 0 vulnerabilities

这是什么意思。这个package.json文件是npm创建的吗？谢谢