Welcome to the forum! I was able to save the Excel file to the data table by just changing the last line of the server module (and importing anvil.media at the top):
app_tables.table_1.add_row(doc=anvil.media.from_file("doc.xlsx"))
edit: Instead of “doc.xlsx”, the clone link now uses “/tmp/doc.xlsx”, per Excel Document Generation: - #8 by hugetim