Make ELASTICSEARCH behave more like DATABASES for the purposes of interacting with configuration

course_discovery/settings/base.py

@@ -249,7 +249,7 @@ SWAGGER_SETTINGS = {
 }
 
 ELASTICSEARCH = {
-    'host': 'es',
+    'host': '',
     'index': 'course_discovery',
     'connect_on_startup': True
 }

course_discovery/settings/production.py

@@ -48,5 +48,11 @@ DB_OVERRIDES = dict(
     PORT=environ.get('DB_MIGRATION_PORT', DATABASES['default']['PORT']),
 )
 
+ES_OVERRIDES = dict(
+    HOST=environ.get('ES_HOST', ELASTICSEARCH['host']),
+    INDEX=environ.get('ES_INDEX', ELASTICSEARCH['index']),
+)
+
+
 for override, value in DB_OVERRIDES.items():
     DATABASES['default'][override] = value