communities: add "About communities" and "Manage" pages

Author: palkerecsenyi

docs/communities/communities.md

@@ -1,5 +1,57 @@
 # Communities
 
-## New community
+On CDS, communities are spaces in which records are curated by specific groups of people, depending on the community's scope.
+Depending on each community's settings, they can allow:
 
-## Your communities
+- **Curating** records; specific community members can review submitted records before publication.
+- **Managing permissions** by specifying which users or CERN Groups can submit new records.
+- **Creating custom pages** such as an About page or a Curation Policy
+
+All records on CDS belong to at least one community.
+When a record is created, it must be submitted to a community, but after publication it can also be submitted
+to additional ones.
+
+## Create a community
+
+In order to ensure communities have a coordinated, user-friendly structure, we don't allow users to create communities directly.
+The CDS team creates communities on request, following careful evaluation.
+Please [contact the CDS team via ServiceNow](https://cern.service-now.com/service-portal?id=sc_cat_item&name=request&se=CDS-Service), specifying the following details:
+
+- The intended name
+- A square logo (maximum 1MB)
+- A short description of what the community will be used for
+- The type of records that will be published in the community (please send links to examples if possible)
+- Whether reviews should be mandatory for newly submitted records (see [Submission policy](./manage.md#submission-policy))
+- Whether the community's contents should be publicly visible
+- The name of a dedicated [GMS group](https://auth.docs.cern.ch/groups/overview/) to set as the initial member of the community
+
+## Members and roles
+
+Communities have members, each with a role which describes their level of access.
+A member can be a CERN user or a group.
+Community owners can specify the initial members, which can then later be edited.
+
+Each member can have one of the following roles:
+
+- **Reader**: Can view all records inside the community, including restricted ones.
+- **Curator**: Can curate/review records submitted to the community and can view all records.
+- **Manager**: Can manage members and roles, can curate records, and can view all records.
+- **Owner**: Full administrative control over all aspects of the community.
+
+!!! info "Access for non-members of the community"
+
+    CDS users who are not members of a community can still view its public records and its details.
+    This can be changed in the community's settings.
+
+    Non-members cannot view the community's restricted records, unless they have been granted [explicit permission](../deposit/access-share.md) on a per-record basis.
+
+[Find out more](./manage.md#members) about managing community members.
+
+## View your communities
+
+To view the communities you are a member of, or to see a full list of communities on CDS, click on the "Communities" tab at the top of the page.
+
+![Communities tab on the CDS website](./images/communities_tab.png)
+
+The communities you are a member of are listed under "My communities", while the latest communities created on CDS are under "New communities".
+To show more results in either section and to search for communities, click "See all".