ECS example: Error loading the 'postgresql' Active Record adapter

[christophetd]

Using the ECS example (https://github.com/DataDog/ecommerce-workshop/blob/main/deploy/aws/ecs/shop-task.json#L63) the container exits with:

/usr/local/lib/ruby/gems/2.5.0/gems/bundler-1.16.6/lib/bundler/rubygems_integration.rb:408:in `block (2 levels) in replace_gem': Error loading the 'postgresql' Active Record adapter. Missing a gem it depends on? pg is not part of the bundle. Add it to your Gemfile. (LoadError)

[christophetd]

Replacing the image burningion/ecommerce-spree-observability with ddtraining/storefront-fixed:2.1.4 seems to do the trick