fix: refactor file path handling for cover image downloads

src/download_cover.ts

@@ -1,5 +1,6 @@
 import axios from "axios";
 import fs from "node:fs";
+import path from "node:path";
 
 export async function download_image_from_caa(mbid: string) {
   console.log("[DEBUG]: download_image_from_caa:", mbid);
@@ -14,7 +15,14 @@ export async function download_image_from_caa(mbid: string) {
       },
     );
 
-    fs.writeFileSync(`public/covers/mb/${mbid}.png`, img_response.data);
+    const mb_dist = path.join(
+      process.cwd(),
+      "public",
+      "covers",
+      "mb",
+      `${mbid}.png`,
+    );
+    fs.writeFileSync(mb_dist, img_response.data);
   } catch (error) {
     console.error("Error fetching data:", error);
     throw error;
@@ -62,16 +70,22 @@ export async function download_image_from_itunes(
       throw new Error(`iTunes URL not found for ${rawArtist} - ${rawAlbum}`);
     }
 
-    const artist_dir = `public/covers/itunes/${safeArtist}`;
-    if (!fs.existsSync(artist_dir)) {
-      fs.mkdirSync(artist_dir, { recursive: true });
+    const artist_dist = path.join(
+      process.cwd(),
+      "public",
+      "covers",
+      "itunes",
+      safeArtist,
+    );
+    if (!fs.existsSync(artist_dist)) {
+      fs.mkdirSync(artist_dist, { recursive: true });
     }
 
     const img_response = await axios.get(itunes_url, {
       responseType: "arraybuffer",
     });
 
-    fs.writeFileSync(`${artist_dir}/${safeAlbum}.png`, img_response.data);
+    fs.writeFileSync(`${artist_dist}/${safeAlbum}.png`, img_response.data);
   } catch (error) {
     console.error("Error fetching data:", error);
     throw error;

src/index.ts

@@ -1,6 +1,7 @@
 import { Elysia } from "elysia";
 import { cors } from "@elysiajs/cors";
 import { node } from "@elysiajs/node";
+import path from "node:path";
 
 import fs from "node:fs";
 
@@ -35,8 +36,21 @@ async function get_image_from_server(
     .trim();
   const safeMbid = mbid.replace(/[^a-zA-Z0-9\-]/g, "");
 
-  const MBFilePath = `public/covers/mb/${safeMbid}.png`;
-  const iTunesFilePath = `public/covers/itunes/${safeArtist}/${safeAlbum}.png`;
+  const MBFilePath = path.join(
+    process.cwd(),
+    "public",
+    "covers",
+    "mb",
+    `${safeMbid}.png`,
+  );
+  const iTunesFilePath = path.join(
+    process.cwd(),
+    "public",
+    "covers",
+    "itunes",
+    safeArtist,
+    `${safeAlbum}.png`,
+  );
 
   let resultFilePath = MBFilePath;