Public preview: GitHub action to build and deploy to Azure Container Apps

By integrating this task into their workflows, customers can enable continuous delivery of their source code to Azure Container Apps. The GitHub action builds source code in a repository into a container image, pushes it to Azure Container Registry, and deploys it to Container Apps. The action uses a Dockerfile if one is provided. If there is no Dockerfile, it can still build a container image from source code for supported languages and runtimes, including .NET, Python, and Node.js. [Learn more](https://aka.ms/container-apps/github-actions). * Azure Container Apps * Features * [ Azure Container Apps](https://azure.microsoft.com/en-gb/products/container-apps/)