'To point domain to IP address with port number (ubuntu)

I have my domain on namecheap and My ubuntu server on upcloud. My react app is installed on ubuntu server. It's ip is xx.xx.xx.xx:3000 I tried pointing it through namecheap but when I go to the url it shows the content from xx.xx.xx.xx (not from xx.xx.xx.xx:3000) How to solve this issue?



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