Correct logging setup with docker image

[col-panic]

I am using redmine:5.1 (alpine) docker image.

I want to configure config.log_tags = [:request_id] to send logs to fluentd and collect the requests for opensearch.

Adding config.log_tags = [:request_id] to config/additional_environment.rb does not work.

And while https://github.com/redmine/redmine/blob/1d1c5c3a2c50ac0e47f15ccbd08f9ec46496a3b3/config/environments/production.rb#L61 would already provide support for an environment variables based usage of STDOUT as logging facility,
this line

redmine/5.1/alpine3.20/Dockerfile

Line 88 in 47d9994

echo 'config.logger = Logger.new(STDOUT)' > config/additional_environment.rb; \

overrides all settings.

So for my scenario i could make it run by creating config/additional_environment.rb with content

config.log_tags = [:request_id]
logger           = ActiveSupport::Logger.new(STDOUT)
logger.formatter = config.log_formatter
config.logger    = ActiveSupport::TaggedLogging.new(logger)

but I think the correct way would be to remove the line in

redmine/5.1/alpine3.20/Dockerfile

Line 88 in 47d9994

echo 'config.logger = Logger.new(STDOUT)' > config/additional_environment.rb; \

and use the environment variable
RAILS_LOG_TO_STDOUT