role logging_args method, use in app

lib/kamal/commands/app.rb

@@ -21,7 +21,7 @@ class Kamal::Commands::App < Kamal::Commands::Base
       "-e", "KAMAL_VERSION=\"#{config.version}\"",
       *role_config.env_args,
       *role_config.health_check_args,
-      *config.logging_args,
+      *role_config.logging_args,
       *config.volume_args,
       *role_config.asset_volume_args,
       *role_config.label_args,

lib/kamal/configuration/role.rb

@@ -36,6 +36,18 @@ class Kamal::Configuration::Role
     argumentize "--label", labels
   end
 
+  def logging_args
+    args = config.logging || {}
+    args.deep_merge!(specializations['logging']) if specializations['logging'].present?
+
+    if args.any?
+      optionize({ "log-driver" => args["driver"] }.compact) +
+        argumentize("--log-opt", args["options"])
+    else
+      config.logging_args
+    end
+  end
+
 
   def env
     if config.env && config.env["secret"]