Fix startup

package.json

@@ -6,7 +6,7 @@
 	"type": "module",
 	"scripts": {
 		"start": "node src/main.mjs",
-		"start:prod": "mv assets/* $ZIM_DIR/ && npm run start",
+		"start:prod": "(mv /app/assets/* $ZIM_DIR/ || echo) && npm run start",
 		"archive-zim": "zimwriterfs --welcome=index.html --illustration=logo.png --language=eng --name=Archive --title=Archive --description=\"Your personal space for saving and browsing uploaded files\" --creator=ZaksCode --publisher=ZaksCode ./archive assets/archive.zim"
 	},
 	"keywords": [],