The problem with straight Docker is you're left to deal with iptables and everything else on your own. Even the self-hosted PaaS offerings don't do a whole lot for you here, either. You're still on your own to configure backups, automatic package updates, system reboots, monitoring (?), and other system admin tasks.
It's borderline on whether Docker is worth it at that scale. You could just as easily setup a git hook to redeploy on push. Maybe use SQLite instead of Postgres. Configure nginx + Let's Encrypt. Without Docker you get sane iptables again, which is a benefit. And systemd can replace most functionality of docker-compose. Plus cron tasks are kinda awkward with Docker, which you'll probably need to do at some point.
The problem with straight Docker is you're left to deal with iptables and everything else on your own. Even the self-hosted PaaS offerings don't do a whole lot for you here, either. You're still on your own to configure backups, automatic package updates, system reboots, monitoring (?), and other system admin tasks.
It's borderline on whether Docker is worth it at that scale. You could just as easily setup a git hook to redeploy on push. Maybe use SQLite instead of Postgres. Configure nginx + Let's Encrypt. Without Docker you get sane iptables again, which is a benefit. And systemd can replace most functionality of docker-compose. Plus cron tasks are kinda awkward with Docker, which you'll probably need to do at some point.