title: COPY with docker but with exclusion
body: <p>In a Dockerfile, I have</p>
  
  <pre><code>COPY . .
  </code></pre>
  
  <p>I want to exclude an entire directory, in my case, node_modules directory.</p>
  
  <p>Something like this:</p>
  
  <pre><code>   COPY [all but **/node_modules/**] .
  </code></pre>
  
  <p>Is this possible with Docker?</p>