Update index creation documentation with correct settings for NextCloud

README.md

@@ -46,6 +46,29 @@ Example connection using cURL:
 curl -u elastic:<password> http://localhost:9200
 ```
 
+### Setting up Indices
+
+**Important:** Before using Elasticsearch with apps like NextCloud, you need to create the necessary indices.
+
+For NextCloud FullTextSearch:
+
+```bash
+# Replace with your actual Elasticsearch IP address and password
+curl -X PUT "http://elastic:PASSWORD@IPADDRESS:9200/nextcloud" -H 'Content-Type: application/json' -d'
+{
+  "settings": {
+    "index": {
+      "number_of_shards": 1,
+      "number_of_replicas": 0,
+      "refresh_interval": "10s"
+    }
+  }
+}
+'
+```
+
+You can get the IP address from the Cloudron admin panel or by using the `cloudron status` command. The password is stored in `/app/data/credentials.txt`.
+
 ## Security Notes
 
 - HTTP SSL is disabled for compatibility with most client applications