How do we host a sample external React Js Application within Sharepoint?

[Akhil_Arelli1309]

I created a sample React Js Application hosting in local server as http://localhost:3000/ . Its an NPM used Application(Node js). According to my investigation in sharepoint, if we a user need to host any Sample application it may be React , Js , Java he need to create a sppkg file within his application. If we create a sppkg file its simple to deploy it to App catalog in Sharepoint.

Anyone provide me better solution or procedure to solve this.

[#2]

Hi,
Try creating a SharePoint Framework solution, which is the modern development for developing client side solution. You can use React, Angular, Vue along with typescript. Please follow the below link. You can also find how to convert the existing app to the SharePoint Framework concept.
https://docs.microsoft.com/en-us/sharepoint/dev/spfx/sharepoint-framework-overview