update readme

README.md

@@ -1,8 +1,26 @@
-# Example config for homeserver.yaml
+# Synapse Invite Checker Module
-```
+
+This is a Synapse module that checks incoming invites based on whitelist and blacklist rules. The module allows or blocks invites from certain homeservers depending on whether they appear in a dynamically fetched whitelist or blacklist JSON file.
+
+## Features
+
+- **Whitelist and Blacklist**: Allows invites from homeservers in the whitelist, blocks invites from homeservers in the blacklist.
+- **Dynamic Fetching**: The whitelist and blacklist are fetched dynamically from a provided URL, and cached for 10 minutes.
+- **Fallback on Failure**: If the JSON file cannot be fetched (e.g., network error), the module automatically allows all invites to prevent disruptions.
+
+## Configuration
+
+Add this module to your Synapse's `homeserver.yaml` under the `modules` section. Here’s an example configuration:
+
+```yaml
+modules:
   - module: synapse_invite_checker.InviteChecker
     config:
-      blacklist_whitelist_url: "https://example.com/invites.json"
+      # URL to fetch the JSON file containing the whitelist and blacklist
+      blacklist_whitelist_url: "https://example.com/invite-checker-lists.json"
+
+      # Whether to use the whitelist to allow certain homeservers (default: true)
       use_whitelist: true
+
+      # Whether to use the blacklist to block certain homeservers (default: true)
       use_blacklist: true
-```