Enable Footnote Backreferences

config.toml

@@ -34,6 +34,7 @@ include_content = true      # include rendered content of page/section in index
 [markdown]
 highlight_code = true
 highlight_theme = "css"
+bottom_footnotes = true # adds footnote backreference
 render_emoji = false
 external_links_target_blank = true # rel="noopener"
 external_links_no_follow = false   # rel="nofollow"