You must use Bundler 2 or greater with this lockfile. When running docker-compose up locally

Adding this line before RUN bundle install to the Dockerfile did the trick for me.

RUN gem install bundler -v 2.0.1

Leaving this here for future reference!

You need to update Rubygems:

RUN gem update --system

Apart of being sure that you have the correct bundler version, run:

RUN gem install bundler -v 2.0.1

Here you can find a deeply explanation.

in your Gemfile.lock, at the bottom, you may find bundle version:

BUNDLED WITH
2.0.1

Please make sure you bundled it with the correct version that you have