title: "docker build" requires exactly 1 argument(s)
body: <p>I am trying to build an image from a specific Dockerfile, and tag it at the same time; I am following the <a href="https://docs.docker.com/engine/reference/commandline/build/#tag-an-image--t" rel="noreferrer">online instructions</a> for<code>docker build</code>, but I get the following error:</p>
  <blockquote>
  <p>&quot;docker build&quot; requires exactly 1 argument(s)</p>
  </blockquote>
  <h3>My directory structure:</h3>
  <pre><code>project/
      foo/
      MyDockerfile
  </code></pre>
  <p>This is the command I run:</p>
  <p><code>docker build -f /full/path/to/MyDockerfile -t proj:myapp</code></p>
  <p>I have tried various combinations of the above command, but the results are always the error message given above. Why is this happening - as I am following what the documentation says?</p>