How can i update the node version used in deployment?

Hi everyone. I have a nextjs application that I deployed on dokploy on my vps server. Initially this application does not cause any problems. After a certain period of time (usually between 2-24 hours) the application crashes completely and the application and my vps server becomes inaccessible. I have to reload my vps server through the panel. I think this is caused by this error in the log, please help. Thanks. and I use Nixpacks for build.