add some opengraph bullshit for previews

src/main.rs

@@ -225,9 +225,15 @@ fn main() {
 
         // Generate the detail page
         {
+            let win_title = format!("Bread from {}", date);
+        
             let detail = detail_tpl
-                .replace("{head}", &head_tpl.replace("{title}", &format!("Bread from {}", date)).trim())
-                .replace("{title}", &date)
+                .replace("{head}", &head_tpl.replace("{title}", &win_title))
+                .replace("{title}", &win_title)
+                .replace("{date}", &date_slug)
+                .replace("{url}", &format!("https://www.ondrovo.com/bread/{}", detail_file))
+                .replace("{thumb_url}", &format!("https://www.ondrovo.com/bread/thumbs/{}", thumb_fname))
+                .replace("{heading}", &date)
                 .replace("{note}", note.trim());
 
             let mut pics = String::new();