Dockerfile in gfsm-0.5.0 vs Dockerfile in gfsm-0.5.1

@@ -1,8 +1,10 @@
 FROM ruby:3.2.4-alpine3.20
 
+ARG GFSM_VERSION
+
 RUN apk add git
-RUN gem install gfsm
+RUN gem install gfsm -v ${GFSM_VERSION}
 
 COPY ./gfsmrc.yml ./gfsmrc.yml
 
-ENTRYPOINT [""]
\ No newline at end of file
+ENTRYPOINT [""]