As you may already know, Azure Function is a serverless computing service designed to accelerate and simplify application development.
Well, good news is PowerShell support in Azure Function is now generally available, which means you can now use your existing PowerShell code into Azure Function 
You can get more details on how to use PowerShell in Azure Function here https://docs.microsoft.com/en-us/azure/azure-functions/functions-reference-powershell
Or you can also take a look at this tutorial on how to integrate your PowerShell code into Azure Function here https://docs.microsoft.com/en-us/azure/azure-functions/functions-create-first-function-powershell