build: resolve build error in docker container

RubyGems version (3.0.3) has a bug that prevents `required_ruby_version` from working for Bundler. Any scripts that use `gem install bundler` will break as soon as Bundler drops support for your Ruby version. Please upgrade RubyGems to avoid future breakage and silence this warning by running `gem update --system 3.2.3`

Dockerfile

@@ -13,7 +13,7 @@ RUN apk add --update \
     nodejs \
     tzdata \
     && rm -rf /var/cache/apk/* \
-    && gem update --system \
+    && gem update --system 3.2.3 \
     && gem install bundler:$BUNDLER_VERSION \
     && bundle config --global frozen 1