feat: add discover customization (#3182)

server/index.ts

@@ -1,5 +1,6 @@
 import PlexAPI from '@server/api/plexapi';
 import dataSource, { getRepository } from '@server/datasource';
+import DiscoverSlider from '@server/entity/DiscoverSlider';
 import { Session } from '@server/entity/Session';
 import { User } from '@server/entity/User';
 import { startJobs } from '@server/job/schedule';
@@ -95,6 +96,9 @@ app
     // Start Jobs
     startJobs();
 
+    // Bootstrap Discovery Sliders
+    await DiscoverSlider.bootstrapSliders();
+
     const server = express();
     if (settings.main.trustProxy) {
       server.enable('trust proxy');