I just noticed in my app services on azure, there is no longer a "Container Settings" link. Does anyone know where we are supposed to configure the container image, etc. now?
2 Answers
It's now part of the Deployment center blade:
However, if you're also deploying your webapp via an Azure pipeline, that information can be overridden with the pipeline information, which can hide the container settings.
I've opened a issue on Github: https://github.com/MicrosoftDocs/azure-docs/issues/86094
While deploying the app service you will be having an option to deploy it on container 
And then you need to fill the details(Docker/container registry) and deploy your app. once you deploy you can see the details in configuration options under settings tab.
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