Updated uuid to string

app.py

@@ -27,12 +27,11 @@ html_file = st.file_uploader("Upload a html file", type=["html"])
 
 if html_file is not None:
     stringio = StringIO(html_file.getvalue().decode("utf-8"))
-    st.write(stringio)
-
     string_data = stringio.read()
-    st.write(string_data)
+    with st.expander("Uploaded HTML"):
+        st.write(string_data)
 
-    document_id = uuid.uuid4()
+    document_id = str(uuid.uuid4())
 
     document = Document(text=string_data)
     document.metadata["id"] = document_id