node js error

I am trying to install tailwind(css frame work),by npm file through vs code ,but found this error npm install -D tailwindcss (node:7428) [DEP0170] DeprecationWarning: The URL http://your-proxy-server:your-proxy-port is invalid. Future versions of Node.js will throw an error. (Use `node --trace-deprecation ...` to show where the warning was created) (node:9692) [DEP0170] DeprecationWarning: The URL http://your-proxy-server:your-proxy-port is invalid. Future versions of Node.js will throw an error. (Use `node --trace-deprecation ...` to show where the warning was created)