Prevent _default.md being included in [[...markdownPath]].md

Author: SukkaW

src/content/errors/default.md renamed to src/content/errors/_default.md

@@ -266,7 +266,9 @@ export async function getStaticPaths() {
           : res.slice(rootDir.length + 1);
       })
     );
-    return files.flat().filter((file) => file.endsWith('.md'));
+    return files
+      .flat()
+      .filter((file) => file.endsWith('.md') && !file.startsWith('_'));
   }
 
   // 'foo/bar/baz.md' -> ['foo', 'bar', 'baz']
@@ -280,6 +282,7 @@ export async function getStaticPaths() {
   }
 
   const files = await getFiles(rootDir);
+
   const paths = files.map((file) => ({
     params: {
       markdownPath: getSegments(file),

src/pages/[[...markdownPath]].js

@@ -127,7 +127,7 @@ export const getStaticProps: GetStaticProps<ErrorDecoderProps> = async ({
     mdx = fs.readFileSync(rootDir + path + '.md', 'utf8');
   } catch {
     // if error_code.md is not found, fallback to default.md
-    mdx = fs.readFileSync(rootDir + '/default.md', 'utf8');
+    mdx = fs.readFileSync(rootDir + '/_default.md', 'utf8');
   }
 
   // See if we have a cached output first.