Fail to create a container app when choosing "Build from project remotely using ACR" to create it without a default Dockerfile selected

OS: Win 10
Build Version: 20230406.10

Repro Steps:

1. Open a project in VS Code.
2. Right click one container app environment -> Select "Create Container App... -> Enter a container app name -> "Select "Build from project remotely using Azure Container Registry" -> Select an Azure Container Registry -> Don't select the default Dockerfile of the opened project, select "Browse..." to choose a Dockerfile from another project and fill the following steps to create a container app.
3. Check whether succeeds to create a container app.

Expect:
Succeed to create a container app.

Actual:
Fail to create a container app with an error.

More Info:
This issue does not reproduce if creating with the default Dockerfile of the opened project.

Reproduce the VS Code Container App creation flow using “Build from project remotely using Azure Container Registry,” selecting a Dockerfile through Browse from another project instead of the opened project’s default. Compare the failure with the working default-Dockerfile path; done means the alternate Dockerfile path creates the container app successfully without the reported error.