feat: basic post structured data for SEO

src/utils/date-utils.ts

@@ -1,7 +1,3 @@
 export function formatDateToYYYYMMDD(date: Date): string {
-  const year = date.getFullYear()
-  const month = (date.getMonth() + 1).toString().padStart(2, '0')
-  const day = date.getDate().toString().padStart(2, '0')
-
-  return `${year}-${month}-${day}`
+  return date.toISOString().substring(0, 10)
 }