Dockerfile in hetzner-k3s-0.3.6 vs Dockerfile in hetzner-k3s-0.3.7

@@ -1,9 +1,12 @@
 FROM ruby:2.7.4-alpine
 
 RUN apk update --no-cache \
   && apk add build-base git openssh-client
 
+COPY Gemfile Gemfile
+COPY hetzner-k3s.gemspec hetzner-k3s.gemspec
+
 RUN gem install hetzner-k3s
 
 COPY entrypoint.sh /entrypoint.sh
 
 ENTRYPOINT ["/entrypoint.sh"]