Update server.js

server.js

@@ -74,8 +74,8 @@ app.post('/gen', upload.single('image'), async (req, res) => {
               "text": prompt,
             },
             {
-              "type": "image/jpeg",
-              "image": img,
+              "type": "image/png",
+              "base64": img,
             },
           ],
         }