title: what is docker run -w flag?
body: <p>Came across a docker run command that uses -w flag.</p>
  <pre><code>docker run -v $(pwd):/project \
           -w /project \
           -p 8081:8081 \
           gcr.io/base-project/myoh:v1
  </code></pre>
  <p>Any idea what the <code>-w</code> flag is for?</p>