fix: correct audio file path for filesize calculation

services/podcast.ts

@@ -27,7 +27,9 @@ export async function updatePodcastRSS() {
   for (const ep of episodes) {
     const fileUrl = `${baseUrl}/podcast_audio/${path.basename(ep.audioPath)}`;
     const pubDate = new Date(ep.pubDate).toUTCString();
-    const fileSize = fsSync.statSync(ep.audioPath).size;
+    const fileSize = fsSync.statSync(
+      path.join(import.meta.dir, "public/podcast_audio", ep.audioPath),
+    ).size;
     itemsXml += `
       <item>
         <title><![CDATA[${ep.title}]]></title>