Updated incorrect file path

server.cjs

@@ -342,7 +342,7 @@ app.delete("/trigger/api/themes", async (req, res) => {
 });
 
 app.get("/trigger/api/backgrounds", async (req, res) => {
-	fs.readdir("../TriggerFrontend/public/backgrounds", (err, files) => {
+	fs.readdir("../TriggerFrontend/dist/backgrounds", (err, files) => {
 		res.status(200).send(files);
 	});
 });