Update README.md

Author: Sahedo

README.md

@@ -1 +1,11 @@
-# JSON-Shema-validator
+# JSON-Shema-validator
+This is script for Godot Engine, that validate JSON files by JSON Schema.
+
+# How to use
+Create new JSONSchema object in your script (this script automatically register class in Godot ClassDB).
+Call its function validate(json_data, json_schema) where
+json_data - is your data in string format;
+json_schema - is your json_schema in string format.
+
+# Links
+More about schemas and validation here: https://json-schema.org