Fix “npm ERR! ERESOLVE could not resolve” in Cloudflare Pages Build

If you’re deploying a React app (or any Node.js project) on Cloudflare Pages and encountering this common build error: npm ERR! ERESOLVE could not resolve npm ERR! While resolving: @date-io/date-fns@3.2.1 npm ERR! Found: date-fns@2.30.0 ... npm ERR! ...