message: dockerfile: add some instructions on how to run
diff: FROM nginx:mainline
  +# This dockerfile requires the app to be built on the host first, as it
  +# simply copies in the build output into the image.
  +
  +# The safest way to build this image is to use `yarn docker-build`
  +
  COPY packages/app/build /usr/share/nginx/html
  COPY docker/default.conf.template /etc/nginx/conf.d/default.conf.template
  COPY docker/run.sh /usr/local/bin/run.sh
  