message: install latest fluent-plugins
diff: @@ -8,6 +8,7 @@ USER root
  RUN apk add --no-cache --update --virtual .build-deps \
  build-base ruby-dev \
  + && gem sources --update \
  && gem install fluent-plugin-cloudwatch-logs \
  && gem install fluent-plugin-datadog \
  && gem install fluent-plugin-kubernetes_metadata_filter \
  @@ -21,6 +22,7 @@ RUN apk add --no-cache --update --virtual .build-deps \
  && gem install fluent-plugin-s3 --no-document \
  && gem install fluent-plugin-splunk-enterprise \
  && gem install fluent-plugin-sumologic_output \
  + && gem list \
  && gem sources --clear-all \
  && apk del .build-deps \
  && rm -rf /tmp/* /var/tmp/* /usr/lib/ruby/gems/*/cache/*.gem \
  