General availability of App Service on Linux and Web App for Containers | Blog | Microsoft Azure
Introduction to Azure Web Apps for Containers | Microsoft Docs
Microsoft's Azure App Service on Linux now in general availability | On MSFT
"The availability includes the Web App for Containers capability and means that Microsoft now offers up built-in image support for ASP.NETCore, Node.js, PHP and Ruby on Linux."
Pricing - App Service | Microsoft Azure