title: Error: Failed to solve with frontend dockerfile.v0: failed to create LLB definition: no match for platform in manifest when building docker image
body: <p>I get the error:</p>
  <pre><code>failed to solve with frontend dockerfile.v0: failed to create LLB definition: no match for platform in manifest
  </code></pre>
  <p>when building the following Dockerfile:</p>
  <pre><code>FROM mcr.microsoft.com/dotnet/framework/aspnet:4.8
  COPY . /inetpub/wwwroot
  </code></pre>