Docker-compose volume mount before run : <p>I have a Dockerfile I'm pointing at from a docker-compose.yml.</p>

<p>I'd like the volume mount in the docker-compose.yml to happen before the <code>RUN</code> in the Dockerfile. </p>

<p>Dockerfile:</p>

<pre><code>FROM node

WORKDIR /usr/src/app

RUN npm install --global gulp-cli \
 &amp;&amp; npm install

ENTRYPOINT gulp watch
</code></pre>

<p>docker-compose.yml</p>

<pre><code>version: '2'

services:
  build_tools:
    build: docker/gulp
    volumes_from:
      - build_data:rw

  build_data:
    image: debian:jessie
    volumes:
      - .:/usr/src/app
</code></pre>

<p>It makes complete sense for it to do the Dockerfile first, then mount from docker-compose, however is there a way to get around it.</p>

<p>I want to keep the Dockerfile generic, while passing more specific bits in from compose. Perhaps that's not the best practice?</p>
