Azure container app error with .NET SDK 8

Hi all,

We plan to migrate on-premises internal apps to Azure using Azure container app. But when I deploy from image, it shows error:

The command could not be loaded, possibly because:

• You intended to execute a .NET application: The application 'app.dll' does not exist.
• You intended to execute a .NET SDK command: No .NET SDKs were found.

Download a .NET SDK:

https://aka.ms/dotnet/download

Learn about SDK resolution:

https://aka.ms/dotnet/sdk-not-found

This image work well with on-premises environment.

Please help!