Update main.py

main.py

@@ -380,7 +380,7 @@ async def create_presentation(data: PresentationModel):
     if not data.markdown:
         raise HTTPException(status_code=400, detail="Please provide Markdown text.")
 
-    markdown_with_images = replace_image_keywords(extract_data_from_tag(markdown, "marp_presentation"))
+    markdown_with_images = replace_image_keywords(extract_data_from_tag(data.markdown, "marp_presentation"))
     result = convert_markdown_marp(markdown_with_images, output_format)
 
     if result: