feat: update remove-image-background route

app.py

@@ -362,7 +362,10 @@ async def remove_image_background(image: UploadFile = File(...), token: str = De
         return StreamingResponse(
             content=buffer,
             media_type='image/png',
-            headers={"Content-Disposition": "inline; filename=image.png"}
+            headers={
+                "Content-Disposition": "inline; filename=image.png",
+                "Content-Length": str(len(buffer.getvalue()))
+            }
         )
 
     except Exception as e: