When filtering content only include ".md" files

    Current filter allows for ".md" anywhere in the file name.
    Update to force filter to allow only files ending with ".md"

lib/contentParser.js

@@ -30,7 +30,7 @@ export const getListPage = async (filePath) => {
 // get all single pages, ex: blog/post.md
 export const getSinglePage = (folder) => {
   const filesPath = fs.readdirSync(folder);
-  const sanitizeFiles = filesPath.filter((file) => file.includes(".md"));
+  const sanitizeFiles = filesPath.filter((file) => file.endsWith(".md"));
   const filterSingleFiles = sanitizeFiles.filter((file) =>
     file.match(/^(?!_)/)
   );