Ask HN: Hosting on Digital Ocean, any advice for monitoring and deployments?

I'm moving over from Lambda to Digital Ocean since I found it much easier to test locally and iterate. Unfortunately, I'm not too savvy with setting up monitoring so I can see how often failures are happening and how to smoothly deploy changes on DO. I currently have a setup where I pull each individual change into my instance and re-run docker-compose build etc. Would love to learn more about what tools have helped you for logging/monitoring/deployments