Optional gem vendoring

[abstrctn]

At the moment, the section of the Dockerfile that runs bundle install will fail if gems are not vendored locally in the repository:

# Install gems
ONBUILD COPY Gemfile Gemfile.lock /usr/src/app/
ONBUILD COPY vendor /usr/src/app/vendor
ONBUILD RUN bundle install --local --jobs `nproc`

Is there any way to make this step somehow optional? While vendoring works for us as a general rule, there are cases where it makes less sense, such as in open source projects.

[buth]

Why does it make less sense for an open source project to vendor its dependencies?