precise documentation

Author: Antoine Verin

website/docs/index.html.markdown

@@ -8,7 +8,11 @@ description: |-
 
 # ElkAliases Provider
 
-The ElkAliases provider gives the ability to deploy index template to a ElasticSearch server
+The ElkAliases provider gives the ability to add aliases to index and data-stream to a ElasticSearch server
+
+With the current provider from elasticstack, the only place where it is possible to declare aliases is in the index template creation.
+This approach doesn't allow us to add aliases to indexes that are already created, since the template is used only at the creation of a new index and doesn't apply to already existing ones.
+To solve this problem, we have created this provider, which enables you through the `elkaliases_index_aliases` resource to add aliases to existing indices.
 
 Use the navigation to the left to read about the available resources.
 

website/docs/r/elkaliases_index_aliases.markdown

@@ -8,7 +8,10 @@ description: |-
 
 # alkaliases\_index
 
-The ``elkaliases_index_aliases`` resource creates aliases in an index
+The ``elkaliases_index_aliases`` resource creates aliases in an existing index.
+
+
+~> **Note**: The index needs to already exist at deployment time. This means that you cannot create an index template and apply aliases to it directly. You need to create an index or data stream first.
 
 ## Usage