Fix Docker volume mounts and database path for proper persistence

src/server.js

@@ -51,7 +51,12 @@ const libraryPath = path.isAbsolute(config.libraryPath)
   ? config.libraryPath 
   : path.join(process.cwd(), config.libraryPath);
 app.use('/audio', express.static(libraryPath));
-app.use('/artwork', express.static(path.join(process.cwd(), 'artwork')));
+
+// Artwork can be in data directory (Docker) or root (local)
+const artworkPath = process.env.NODE_ENV === 'production' 
+  ? path.join(process.cwd(), 'data', 'artwork')
+  : path.join(process.cwd(), 'artwork');
+app.use('/artwork', express.static(artworkPath));
 
 // Health check
 app.get('/health', (req, res) => {