title: Docker - failed to compute cache key: not found - runs fine in Visual Studio
body: <p>I've generated a Dockerfile with Visual Studio. It runs in Visual Studio just fine and now I'm trying to build it from Windows itself (<code>docker build .</code>, and I tried many combinations). Yet I get the following error:</p>
  <p><a href="https://i.stack.imgur.com/k88vu.png" rel="noreferrer"><img src="https://i.stack.imgur.com/k88vu.png" alt="Error code" /></a></p>
  <p>When I change copy to <code>./client.csproj</code> it does continue and then I get:</p>
  <p><a href="https://i.stack.imgur.com/FWMkZ.png" rel="noreferrer"><img src="https://i.stack.imgur.com/FWMkZ.png" alt="Second error with changed copy path" /></a></p>
  <p>What am I doing wrong? I changed Docker Linux to Windows, changed <a href="https://en.wikipedia.org/wiki/Windows_Subsystem_for_Linux" rel="noreferrer">WSL</a>, and restarted everything.</p>
  <p><a href="https://i.stack.imgur.com/6Nr2L.png" rel="noreferrer">Dockerfile client</a></p>