Add page metadata for fic export

custom/fic.el

@@ -69,7 +69,7 @@
     (while (re-search-forward "\\[fn:\\([0-9]*\\):\\([^•]*\\)•\\]" nil t)
       (replace-match "@@html:<label for=\"\\1\" class=\"margin-toggle sidenote-number\"></label><input type=\"checkbox\" id=\"\\1\" class=\"margin-toggle\"/><span class=\"sidenote\">@@@@latex:\\\\footnote{@@\\2@@html:</span>@@@@latex:}@@"))
     (let ((user-full-name "Tré")
-	  (org-html-head "<link rel=\"stylesheet\" href=\"/fic/tufte.css\"/><link rel=\"stylesheet\" href=\"/home/mdd/Documents/proj/fic-archive/build/tufte.css\"/><meta name=\"theme-color\" media=\"(prefers-color-scheme: light)\" content=\"#fffff8\" /><meta name=\"theme-color\" media=\"(prefers-color-scheme: dark)\" content=\"#151515\" />")
+	  (org-html-head "<link rel=\"stylesheet\" href=\"/fic/tufte.css\"/>\n<link rel=\"stylesheet\" href=\"/home/mdd/Documents/proj/fic-archive/build/tufte.css\"/>\n<meta name=\"theme-color\" media=\"(prefers-color-scheme: light)\" content=\"#fffff8\" />\n<meta name=\"theme-color\" media=\"(prefers-color-scheme: dark)\" content=\"#151515\" />\n<meta property=\"og:title\" content=\"Tré’s fanfiction\">\n<meta property=\"og:type\" content=\"article\">\n<meta property=\"og:image\" content=\"https://tre.praze.net/ab.png\">\n<meta name=\"description\" property=\"og:description\" content=\"Fanfiction on tre.praze.net\">\n<meta property=\"og:locale\" content=\"en_GB\">\n<meta property=\"og:site_name\" content=\"tre.praze.net\">\n<meta name=\"fediverse:creator\" content=\"@tre@ple.praze.net\">")
 	  (org-export-with-author t)
 	  (org-latex-default-class "memoir"))
       (org-html-export-to-html)