Document Docker deployment for partners

https://redmine.teklia.com/issues/6934

content/deployment/configuration.md

@@ -257,12 +257,12 @@ Port of the PostgreSQL database. Defaults to `9100`.
 
 ### `database.replica`
 
+TODO
+
 ### `database.user`
 
 Name of a PostgreSQL user to use. Defaults to `devuser`. **Please** change this in production.
 
-TODO
-
 ## `docker`
 
 ### `docker.tasks_image`
@@ -501,7 +501,9 @@ Since Arkindex 1.1.0, this parameter only applies to tasks that are not defined
 
 ## `robots_txt_disallow`
 
-TODO
+List of relative paths to disallow in the generated `/robots.txt`. Any path relative to the root will be marked as `Disallow: <path>` so that it should not be scrapped by any Robot.
+
+Example to fordid scraping on the whole instance: `robots_txt_disallow: ["/"]`
 
 ## `s3`
 
@@ -601,7 +603,9 @@ See Django's documentation on [`SESSION_COOKIE_SECURE`](https://docs.djangoproje
 
 ## `signup_default_group`
 
-TODO
+User group Identifier (as UUID) where any new user registering in the instance will be assigned.
+
+This is useful to provide default rights for new users, especially on Ponos farms.
 
 ## `solr`
 
@@ -641,4 +645,6 @@ URL to a [Universal Viewer](http://universalviewer.io/) instance. An absolute UR
 
 ## `workers_max_chunks`
 
-TODO
+Maximum number of chunks in a worker process, expressed as a positive integer. This setting allow administrator to control the number of parallel tasks in a single process to avoid creating really large processes on smaller instances.
+
+Default: 10.