Azure functions publish does not copy all files
Solution 1:
This problem is resolved in Azure Functions (.NET 5.0) but in .NET Core 3.1 use
<PropertyGroup>
<_FunctionsSkipCleanOutput>true</_FunctionsSkipCleanOutput>
</PropertyGroup>
in the project file of Azure Functions as a workaround. Please find the details https://github.com/Azure/Azure-Functions/issues/1525