Hi, I'm trying to build a docker image but I get the following error:

error: failed to solve with frontend dockerfile.v0: failed to read dockerfile: open /var/lib/docker/tmp/buildkit-mount1744191223/myapp.api\Dockerfile: no such file or directory

folder structure

src
-- myapp.api
----- Dockerfile
-- myapp.api.contracts
-- deploy (Pulumi c#)
----- Pulumi.yml
----- deploy.csproj
-- myapp.sln

c# code

var apiImage = new Image("api-image", new()
{
   Build = new DockerBuildArgs
   {
      Context = "..",
      Dockerfile = "..\\myapp.api\\Dockerfile",
      Platform = "linux/amd64",
   },
   ImageName = repo.RepositoryUrl,
   Registry = new RegistryArgs
   {
      Server = repo.RepositoryUrl,
      Username = username,
      Password = password
   }
});

Any suggestions what's wrong? I'm using Windows machine (powershell)

This is just a hunch, but did you try using

/

instead of

\\

? Forward-slashes work on Windows, too, and some tools expect them

I've changed the code as follows

var apiImage = new Image("api-image", new()
{
   Build = new DockerBuildArgs
   {
      Context = "..",
      Dockerfile = "../myapp.api/Dockerfile",
      Platform = "linux/amd64",
   },
   ImageName = repo.RepositoryUrl,
   Registry = new RegistryArgs
   {
      Server = repo.RepositoryUrl,
      Username = username,
      Password = password
   }
});

and got error

error: error hashing dockerfile "../myapp.api/Dockerfile": could not open file ../myapp.api/Dockerfile: open ..\..\myapp.api\Dockerfile: The system cannot find the path specified.

I’m also seeing a similar error on Windows. The same builder args work fine on MacOS.