v2.1 - Add database query

Author: Slddev

README.md

@@ -4,8 +4,16 @@
 
 1. Clone this repository with `git clone https://github.com/Slddev/php-fileuploader`.
 2. Upload files to webserver.
-3. Set database info in `config.php`
-4. Test it.
+3. Execute this database query: 
+ ```CREATE TABLE users (
+    id INT NOT NULL PRIMARY KEY AUTO_INCREMENT,
+    username VARCHAR(50) NOT NULL UNIQUE,
+    password VARCHAR(255) NOT NULL,
+    created_at DATETIME DEFAULT CURRENT_TIMESTAMP
+);
+```
+4. Set database info in `config.php`
+5. Test it.
 
 ## Notes