How to create Docker image for Rshiny app that uses Python scripts too in Windows OS

I’m new to Docker and I want to create a docker image in order to deploy an RShiny app that sources python script using the “reticulate” package. Is there a place where I can start building this Docker image or build it on top of some existing images? Please share the sample docker file you created for a similar use case. It would be much helpful. Thank you

I am not able to understand how to create docker image for Rshiny and Python script