Put your app behind HTTPS.

Your app should never face the raw internet. Point a domain at it, pick Caddy or nginx, and get a production reverse-proxy config with automatic HTTPS, security headers, and websockets — plus the commands to install it on a box you own.

The edge layer you inherit

On a managed platform, HTTPS just happened. Certificates, renewal, security headers, HTTP/2, gzip, the redirect from http to https — all handled before your code ever ran. Move to a box you own and that edge becomes yours to set up and keep correct. A reverse proxy is how you do it cleanly: your app stays on localhost doing one job, and everything internet-facing lives in one config you can read.

The reverse proxy handles your HTTPS endpoint. Behind it, services still need releases, supervision, health checks, and recovery. Bring those operating responsibilities together while keeping certificate renewal and proxy configuration in your infrastructure runbook.