Add getAsset function for assets permalink

src/utils/permalinks.ts

@@ -60,5 +60,13 @@ export const getHomePermalink = (): string => getPermalink('/');
 /** */
 export const getBlogPermalink = (): string => getPermalink(BLOG_BASE);
 
+/** */
+export const getAsset = (path: string): string =>
+  '/' +
+  [BASE_PATHNAME, path]
+    .map((el) => trimSlash(el))
+    .filter((el) => !!el)
+    .join('/');
+
 /** */
 const definitivePermalink = (permalink: string): string => createPath(BASE_PATHNAME, permalink);