Use APP_UPLOAD_LOCATION constant for diskInfo (#271)

server/apps/immich/src/api-v1/server-info/server-info.service.ts

@@ -1,11 +1,12 @@
 import { Injectable } from '@nestjs/common';
 import { ServerInfoDto } from './dto/server-info.dto';
 import diskusage from 'diskusage';
+import { APP_UPLOAD_LOCATION } from '../../constants/upload_location.constant';
 
 @Injectable()
 export class ServerInfoService {
   async getServerInfo() {
-    const diskInfo = await diskusage.check('./upload');
+    const diskInfo = await diskusage.check(APP_UPLOAD_LOCATION);
 
     const usagePercentage = (((diskInfo.total - diskInfo.free) / diskInfo.total) * 100).toFixed(2);