Update change log

Author: ahuarte47

CHANGELOG.md

@@ -5,13 +5,18 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
+### Added
+
+- The default collection objects index can be overridden by the `STAC_COLLECTIONS_INDEX` environment variable.
+- The Item objects index prefix can be overridden by the `STAC_ITEMS_INDEX_PREFIX` environment variable.
+
 ## [v0.2.0]
 
 ### Deprecated
 
 ### Added
 
-- Filter Extension as GET with CQL2-Text and POST with CQL2-JSON, 
+- Filter Extension as GET with CQL2-Text and POST with CQL2-JSON,
   supporting the Basic CQL2 and Basic Spatial Operators conformance classes.
 - Added Elasticsearch local config to support snapshot/restore to local filesystem
 
@@ -44,7 +49,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - Elasticsearch index mappings updated to be more thorough.
 - Endpoints that return items (e.g., /search) now sort the results by 'properties.datetime,id,collection'.
   Previously, there was no sort order defined.
-- Db_to_stac serializer moved to core.py for consistency as it existed in both core and database_logic previously. 
+- Db_to_stac serializer moved to core.py for consistency as it existed in both core and database_logic previously.
 - Use genexp in execute_search and get_all_collections to return results.
 - Added db_to_stac serializer to item_collection method in core.py.
 

stac_fastapi/elasticsearch/stac_fastapi/elasticsearch/database_logic.py

@@ -1,7 +1,7 @@
 """Database logic."""
-import os
 import asyncio
 import logging
+import os
 from base64 import urlsafe_b64decode, urlsafe_b64encode
 from typing import Any, Dict, Iterable, List, Optional, Protocol, Tuple, Type, Union