Docker compose Linux container error "The path must be absolute."

Describe the bug

Running a new web app project from the VS templates via docker compose with Linux containers causes a ‘path must be absolute’ error in WebApplication.CreateBuilder

Adding ‘StaticWebAssetsEnabled’ to false project causes exception to go away, but breaks web site.

There are a bunch of other cases raised for this, but all now closed and marked as resolved. However, myself and several other users still appear to be experiencing in RC2.

Weird thing is, this was working fine yesterday and just started experiencing this morning. Rolling back my mornings changes made no difference and now I see the same problem creating a fresh, simple web app from the templates. Is there a hidden config folder or some such for VS / Docker that could need flushing to resolve the problem? Only thing I can think of, proper head scratcher.

#36180 #35285

@javiercn @ProgrammerAl @sloscialo @cetindogu

To Reproduce

Create .NET core web application with docker (linux)

Exceptions (if any)

Unhandled exception. System.ArgumentException: The path must be absolute. (Parameter ‘root’) at Microsoft.Extensions.FileProviders.PhysicalFileProvider…ctor(String root, ExclusionFilters filters) at Microsoft.Extensions.FileProviders.PhysicalFileProvider…ctor(String root) at Microsoft.AspNetCore.Hosting.StaticWebAssets.StaticWebAssetsLoader.<>c.<UseStaticWebAssetsCore>b__1_0(String contentRoot) at Microsoft.AspNetCore.StaticWebAssets.ManifestStaticWebAssetFileProvider…ctor(StaticWebAssetManifest manifest, Func2 fileProviderFactory) at Microsoft.AspNetCore.Hosting.StaticWebAssets.StaticWebAssetsLoader.UseStaticWebAssetsCore(IWebHostEnvironment environment, Stream manifest) at Microsoft.AspNetCore.Hosting.StaticWebAssets.StaticWebAssetsLoader.UseStaticWebAssets(IWebHostEnvironment environment, IConfiguration configuration) at Microsoft.AspNetCore.WebHost.<>c.<ConfigureWebDefaults>b__9_0(WebHostBuilderContext ctx, IConfigurationBuilder cb) at Microsoft.AspNetCore.Hosting.GenericWebHostBuilder.<>c__DisplayClass9_0.<ConfigureAppConfiguration>b__0(HostBuilderContext context, IConfigurationBuilder builder) at Microsoft.AspNetCore.Hosting.BootstrapHostBuilder.RunDefaultCallbacks(ConfigurationManager configuration, HostBuilder innerBuilder) at Microsoft.AspNetCore.Builder.WebApplicationBuilder..ctor(WebApplicationOptions options, Action1 configureDefaults) at Microsoft.AspNetCore.Builder.WebApplication.CreateBuilder(String[] args) at Program.<Main>$(String[] args)

Further technical details

Visual Studio 17.0.0 RC3 and .NET 6.0.0-rc.2.21480.5.