Typescript application host does not apply Aspire configuration provided via environment variables

[karolz-ms]

Repro steps

1. aspire new -- select "Express/React starter app", create using defaults
2. Copy ~/.aspire/dcp folder to some other folder, e.g. ~/mydcp.
3. DcpPublisher__CliPath="~/mydcp/dcp" aspire run Note: the environment variable uses double-underscore separator, per .NET configuration conventions.
4. Verify which copy of dcp was used to run the application.

Expected

The run should use ~/mydcp/dcp

Actual

The run uses the default ~/.aspire/dcp

Additional remarks

This does NOT happen if the application uses ASP.NET Core/Blazor template, indicating this is most likely a problem with TypeScript application host.