Add Matomo options.

docker-compose.yml

@@ -41,9 +41,14 @@ services:
       # If you disable Wekan API with 'false', Export Board does not work.
       - WITH_API=true
       # Optional: Integration with Matomo https://matomo.org that is installed to your server
+      # The address of the server where Matomo is hosted:
       # - MATOMO_ADDRESS='https://example.com/matomo'
+      # The value of the site ID given in Matomo server for Wekan
       # - MATOMO_SITE_ID='123456789'
-
+      # The option do not track which enables users to not be tracked by matomo"
+      # - MATOMO_DO_NOT_TRACK='false'
+      # The option that allows matomo to retrieve the username:
+      # - MATOMO_WITH_USERNAME='true'
     depends_on:
       - wekandb