Generalization of the extension fields

extension-fields.yml

@@ -1,11 +1,15 @@
 # Extension fields for avoid repetitions inside compose files.
 x-logging:
   &default-logging
-  driver: local
+  driver: syslog
   options:
-    max-size: "1m"
-    max-file: "50"
+    # This requires two files in /etc/rsyslog.d
+    # https://www.loggly.com/use-cases/docker-syslog-logging-and-troubleshooting/
+    tag: "container_name/{{.Name}}"
+    labels: "${hostname}"
+    syslog-facility: # cron, local7, etc.
 
+# Can be removed if not needed
 x-opt-values:
   &volume-opt
   driver_opts: &options