fix: use string values for memory/CPU limits (Dokploy API requirement)

src/orchestrator/production-deployer.ts

@@ -278,10 +278,10 @@ export class ProductionDeployer {
       dockerImage: config.dockerImage,
       sourceType: 'docker',
       registryId: config.registryId,
-      memoryLimit: 2048,
+      memoryLimit: '2048',
-      memoryReservation: 1024,
+      memoryReservation: '1024',
-      cpuLimit: 2,
+      cpuLimit: '2',
-      cpuReservation: 0.5,
+      cpuReservation: '0.5',
     });
 
     state.progress = 55;