title: add-migration : Cannot bind argument to parameter 'Path' because it is an empty string
body: <p>I'm running default api core project on Visual studio 2017 with docker support and
  I got this error everytime I run the command <code>add-migration -name name</code></p>
  
  <blockquote>
    <p>add-migration : Cannot bind argument to parameter 'Path' because it is an empty string.
    At line:1 char:1
    + add-migration
    + ~~~~~~~~~~~~~
        + CategoryInfo          : InvalidData: (:) [Add-Migration], ParameterBindingValidationException
        + FullyQualifiedErrorId : ParameterArgumentValidationErrorEmptyStringNotAllowed,Add-Migration</p>
  </blockquote>
  
  <p>PS : This command works without docker support, but return this error when I add docker support</p>