Dockerfile in fluent-plugin-k8s-metrics-agg-1.2.3

- old
+ new

@@ -1,16 +1,16 @@
-FROM ruby:2.7.4-buster as builder
+FROM ruby:3.1.4-buster as builder
 
 ADD ./ /app/
 WORKDIR /app
 RUN gem install bundler
 RUN bundle update --bundler
 RUN bundle install
 
 RUN bundle exec rake build -t -v
 
-FROM registry.access.redhat.com/ubi8/ruby-27
+FROM registry.access.redhat.com/ubi9/ruby-31
 
 ARG VERSION
 
 LABEL name="Splunk Connect for Kubernetes Metrics Aggregator container" \
       maintainer="DataEdge@splunk.com" \
@@ -29,11 +29,9 @@
 
 RUN mkdir /licenses
 COPY --from=builder /app/LICENSE /licenses/LICENSE
 
 COPY --from=builder /app/docker/Gemfile* ./
-RUN gem update date cgi
-RUN rm -f /usr/share/gems/specifications/default/cgi-0.1.0.gemspec /usr/share/gems/specifications/default/date-3.0.0.gemspec
 RUN yum update -y \
    && yum remove -y nodejs npm \
    && gem install bundler \
    && gem uninstall -i /usr/share/gems bundler \
    && gem unpack /tmp/*.gem --target gem \