.NET Core and node in one image
It is 2 in 1 image with .NET core and node.
If you want to host your SPA application on asp.net with docker you can use a single docker image.
https://docs.microsoft.com/en-us/visualstudio/containers/container-tools-react?view=vs-2019
With this image, there is not necessary to install node into aspnet core image.