concourse: docker images need the latest gems

make sure that an update to Gemfile.lock will create a new layer in the docker image. also make sure all docker images are using the latest bundler. this setup means the dev system generating the docker images needs to be on the latest bundler and has run `bundle update` recently.
sparklemotion · Feb 6, 2019 · 2e5dac5 · 2e5dac5
1 parent 86dded1
commit 2e5dac5
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/concourse/images/bundle-install.step b/concourse/images/bundle-install.step
@@ -1,5 +1,7 @@
 # -*- dockerfile -*-
 
 COPY Gemfile      nokogiri/
+COPY Gemfile.lock nokogiri/
 
+RUN gem install bundler
 RUN cd nokogiri && bundle install