title: Dot and colon meaning
body: <p>What does dot-colon <code>.:</code></p>
  
  <pre><code>- .:/var/www/project:cached
  </code></pre>
  
  <p>mean in situation like this:</p>
  
  <pre><code>version: '3'
  services:
    php:
      image: php:7.1-fpm
      ports:
        - 9000
      volumes:
        - .:/var/www/project:cached
  </code></pre>
  
  <p>Is this part of bash syntax or is it part of Docker syntax (haven't found any info on both).</p>