So, first of all, you should tell us if you are using a hosting panel like CPanel of Plesk or something.
If not, you need to run your app on port 80 and point your domain to your server using an A record if you don't have a DNS server.
The best thing you can do is using pm2 which is a great tool to run and manage node apps on the server.
BTW you better use the #help tag on your post.
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So, first of all, you should tell us if you are using a hosting panel like CPanel of Plesk or something.
If not, you need to run your app on port 80 and point your domain to your server using an A record if you don't have a DNS server.
The best thing you can do is using
pm2which is a great tool to run and manage node apps on the server.BTW you better use the #help tag on your post.