In my previous post I discussed how you could use your .dlls in an On Prem enviroment hosted on your local machine for those who hasn´t jumped to the cloud yet. https://businesscentralgeek.com/how-to-use-dotnets-for-bc-on-premise
In this post I will show you how to do it in a Docker container. The purpose is to test your extensions and .dlls in the lasts versions of Business Central before updating your production app. This is a good practice to make sure they work correctly in every minor and major update.