From a6d986015b7bc14c39272a635166dbe17d05d8f3 Mon Sep 17 00:00:00 2001
From: der <dave@epimorphics.com>
Date: Wed, 17 Jan 2024 09:43:22 +0000
Subject: [PATCH] Pin rubygems updater version

gem update runs rubygems-update under the hood.
Current version of rubygems-update (>=3.5.0) require ruby 3.0 or better.
Last version of rubygems-update compatible with Ruby used here was 3.4.22
---
 Dockerfile | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Dockerfile b/Dockerfile
index ef82b92f..562c9ed9 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -13,7 +13,8 @@ RUN apk add --update \
     tzdata \
     yarn \
     && rm -rf /var/cache/apk/* \
-    && gem update --system \
+    && gem install rubygems-update -v 3.4.22 \
+    && update_rubygems \
     && gem install bundler:$BUNDLER_VERSION \
     && bundle config --global frozen 1