Why combine the React and .NET Core app

Data-driven vs Content-driven apps
Embedding React SPA as section of .NET MVC core APP
My example React App in this .NET Core MVC blog
Routing Challenges
Building React-App as part .NET core app build in Visual Studio (gulp for rescue)

Adding Node/Express API as a part of docker-compose

Environment variabels
Nginx settings
Avoiding CORS issues

Summary
React app as the part of larger .NET Core MVC App
React router -- Internally single page application
.NET Core MVC Routing 
Conflict and resolution by setting as wildcard the .NET core mvc routing