Problem with node js

I have a problem installing express in a project and the following warning appears:

$ npm install express
npm WARN saveError ENOENT: no such file or directory, open'C:\nodeprojects\panolsoft\package.json'

npm WARN enoent ENOENT: no such file or directory, open 'C:\nodeprojects\panolsoft\package.json'

npm WARN panolsoft No description

npm WARN panolsoft No repository field.

npm WARN panolsoft No README data

npm WARN panolsoft No license field.

What should I do?