feat: custom image proxy (#3056)

server/index.ts

@@ -17,6 +17,7 @@ import WebPushAgent from '@server/lib/notifications/agents/webpush';
 import { getSettings } from '@server/lib/settings';
 import logger from '@server/logger';
 import routes from '@server/routes';
+import imageproxy from '@server/routes/imageproxy';
 import { getAppVersion } from '@server/utils/appVersion';
 import restartFlag from '@server/utils/restartFlag';
 import { getClientIp } from '@supercharge/request-ip';
@@ -176,6 +177,9 @@ app
       next();
     });
     server.use('/api/v1', routes);
+
+    server.use('/imageproxy', imageproxy);
+
     server.get('*', (req, res) => handle(req, res));
     server.use(
       (