[DOCS] Small updates

docs/source/configuration.md

@@ -0,0 +1,11 @@
+# Configuration
+
+After installing the Network Mapper, some configuration must be done in the web interface. You will need to log in with an admin account.
+
+:::{important}
+Admin dashboard: this is the admin section of the site, accessed by clicking `Admin` on the navigation bar at the top.
+:::
+
+## Federated Login
+
+Federated login is supported for Google an Microsoft accounts, and can be set up through the `Social Accounts` section of the admin dashboard.

docs/source/index.md

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 The BRECcIA Network Mapper is a web app designed to track and quantify personnel networks & relationships - primarily developed for use in research projects. It is designed for global use across many different organisations involved in a single project, and has been utilised as part of [BRECcIA](https://gcrf-breccia.com) itself.
 
+It can be deployed by individuals or organisations, and supports login with username/password, Google, and Microsoft.
+
 This work was funded through the "Building REsearch Capacity for sustainable water and food security In drylands of sub-saharan Africa" (BRECcIA) project which is supported by UK Research and Innovation as part of the Global Challenges Research Fund, grant number NE/P021093/1.
 
 :::{note}