use Ruby 3 for deployed dummy app

jonasjabari · jonasjabari · commit af628c4a1f08 · 2022-02-15T18:34:00.000+01:00
diff --git a/Dockerfile.release b/Dockerfile.release
@@ -1,4 +1,4 @@
-FROM ruby:2.7.2-alpine3.12
+FROM ruby:3.0-alpine3.12
 
 RUN gem install bundler:2.1.4
 
