Dockerfile in mini_racer-0.6.4 vs Dockerfile in mini_racer-0.7.0

@@ -1,5 +1,5 @@
-ARG RUBY_VERSION=2.7
+ARG RUBY_VERSION=3.2
 FROM ruby:${RUBY_VERSION}
 
 RUN test ! -f /etc/alpine-release || apk add --no-cache build-base git
 
 # without this `COPY .git`, we get the following error: