diff --git a/Dockerfile b/Dockerfile
index 8afd2472c..dda1d3e09 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -24,6 +24,8 @@ RUN apt-get update -qq && \
 
 # Install application gems
 COPY Gemfile Gemfile.lock .ruby-version ./
+COPY lib/bootstrap.rb ./lib/bootstrap.rb
+COPY gems ./gems/
 RUN --mount=type=secret,id=GITHUB_TOKEN --mount=type=cache,id=fizzy-permabundle-${RUBY_VERSION},sharing=locked,target=/permabundle \
     gem install bundler && \
     BUNDLE_PATH=/permabundle BUNDLE_GITHUB__COM="$(cat /run/secrets/GITHUB_TOKEN):x-oauth-basic" bundle install && \