title: (Docker) Getting error: docker-php-source: no such file or directory when building docker file
body: <p>When I'm trying to build the docker file at: <a href="https://github.com/docker-library/php/blob/3f43309a0d5a427f54dc885e0812068ee767c03e/7.1/Dockerfile" rel="nofollow noreferrer">https://github.com/docker-library/php/blob/3f43309a0d5a427f54dc885e0812068ee767c03e/7.1/Dockerfile</a></p>
  
  <p>command: <code>docker build -t php_image .</code></p>
  
  <p>I'm encontering the following error: </p>
  
  <pre><code>Step 14 : COPY docker-php-source /usr/local/bin/
  lstat docker-php-source: no such file or directory
  </code></pre>
  
  <p>Could anybody help me to figure out something wrong here?</p>
  
  <p>Thanks</p>