message: Speed up Dockerfile iterations
diff: @@ -36,14 +36,15 @@ RUN /etc/periodic/weekly/update_mmdb
  WORKDIR /root/shadowbox
  -# Install management service
  -COPY build/shadowbox/app app/
  COPY src/shadowbox/package.json .
  COPY yarn.lock .
  # TODO: Replace with plain old "yarn" once the base image is fixed:
  # https://github.com/nodejs/docker-node/pull/639
  RUN /opt/yarn-v$YARN_VERSION/bin/yarn install --prod
  +# Install management service
  +COPY build/shadowbox/app app/
  +
  # Create default state directory.
  RUN mkdir -p /root/shadowbox/persisted-state
  