Dockerfile in aws_recon-0.2.11 vs Dockerfile in aws_recon-0.2.12

@@ -1,12 +1,13 @@
 ARG RUBY_VERSION=2.6.6
 FROM ruby:${RUBY_VERSION}-alpine
 
 LABEL maintainer="Darkbit <[e-mail]>"
 
+# Supply AWS Recon version at build time
+ARG VERSION
 ARG USER=recon
 ARG GEM=aws_recon
-ARG VERSION=0.2.10
 ARG BUNDLER_VERSION=2.1.4
 
 # Install new Bundler version
 RUN rm /usr/local/lib/ruby/gems/*/specifications/default/bundler-*.gemspec && \
     gem uninstall bundler && \