Add Node JS example to Params Encryption section (#336)

source/advanced_features/params_encryption.rst

@@ -125,11 +125,38 @@ that can be downloaded from `Bouncy Castle Latest Releases`_.
        }
 
        public static void main(String[] args) throws Exception {
-           String email = "encrypted_email@example.com";
+           String email = "email_to_encrypt@example.com";
            System.out.println(encryptParam(email));
        }
    }
 
+Node.js Example
+---------------
+
+.. code-block:: js
+
+   const fs = require('fs');
+   const crypto = require('crypto');
+
+   // Read the public key from file
+   const publicKey = fs.readFileSync('talkable_your_site_slug_public_key.pem', 'utf8');
+
+   const encryptData = (data) => {
+     const encryptedData = crypto.publicEncrypt(
+       {
+         key: publicKey,
+         padding: crypto.constants.RSA_PKCS1_OAEP_PADDING,
+         oaepHash: 'sha1',
+       },
+       Buffer.from(data)
+     );
+     return encryptedData.toString('base64');
+   };
+
+   // Example usage
+   const encryptedEmail = encryptData('email_to_encrypt@example.com');
+   console.log('Encrypted email:', encryptedEmail);
+
 Front-end Part
 --------------