Add optional title

main.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"bytes"
 	"flag"
 	"html/template"
 	"io/ioutil"
@@ -76,5 +77,18 @@ func servePage(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	t.Execute(w, template.HTML(blackfriday.MarkdownCommon(c)))
+	var title string
+	if idx := bytes.IndexByte(c, '\n'); idx != -1 {
+		fl := string(c[:idx])
+		if strings.HasPrefix(fl, `[title]:`) {
+			title = strings.TrimPrefix(fl, `[title]:`)
+		}
+	}
+
+	data := struct {
+		Title   string
+		Content template.HTML
+	}{title, template.HTML(blackfriday.MarkdownCommon(c))}
+
+	t.Execute(w, data)
 }