fix: ran definitions

Author: RahulLanjewar93

src/Options/Definitions.js

@@ -28,6 +28,13 @@ module.exports.SchemaOptions = {
     action: parsers.booleanParser,
     default: false,
   },
+  dropUnknownIndexes: {
+    env: 'PARSE_SERVER_SCHEMA_DROP_UNKNOWN_INDEXES',
+    help:
+      'Drops indexes that are not defined in the schema and are present in the database. Set this false if you are adding indexes manually so that it wont be dropped when you run schema migration',
+    action: parsers.booleanParser,
+    default: true,
+  },
   lockSchemas: {
     env: 'PARSE_SERVER_SCHEMA_LOCK_SCHEMAS',
     help: