title: Laradock install PDFtk
body: <p>I'm trying to install pdftk for laradock (php-fpm and workspace), but pdftk is not found for Ubuntu 20.04. So I try to create a new container, but I don't know how to call it from other containers, like php-fpm and workspace.</p>
  <pre class="lang-sh prettyprint-override"><code># Dockerfile
  FROM ubuntu:16.04
  
  USER root
  
  ARG TOP_LEVEL_DIR=&quot;pdftk&quot;
  
  RUN apt-get update &amp;&amp; \
      apt-get -y install \
          pdftk &amp;&amp; \
      mkdir -p /${TOP_LEVEL_DIR}
  
  WORKDIR /var/www
  ENTRYPOINT [&quot;/usr/bin/pdftk&quot;]
  CMD [ &quot;/bin/bash&quot; ]
  </code></pre>
  <pre class="lang-yaml prettyprint-override"><code># docker-composer.yml
  
  ### pdftk ###############################################
      pdftk:
        image: pdftk
        container_name: pdftk
        build:
          context: ./pdftk
        volumes:
            - ${PWD}:/pdftk
            - /var/run/docker.sock:/var/run/docker.sock
        tty: true
        depends_on:
          - workspace
        networks:
          - backend
  </code></pre>
  <p>Many thanks</p>