Reference the dev container guides in a comment in the production doc…

…kerfile

railties/lib/rails/generators/rails/app/templates/Dockerfile.tt

@@ -1,7 +1,8 @@
 # syntax = docker/dockerfile:1
 
 # Note: This Dockerfile is optimized for production deployment and isn't a good base
-# for development enviroments.
+# for development enviroments. See the guide for more information:
+# https://guides.rubyonrails.org/getting_started_with_devcontainer.html
 
 # Make sure RUBY_VERSION matches the Ruby version in .ruby-version
 ARG RUBY_VERSION=<%= gem_ruby_version %>