Design database and file backups that meet your RPO and RTO: the 3-2-1 rule, retention, encryption, scheduled scripts, alerts on failure and a tested restore procedure.
Design observability for your backend: SLOs per user journey, a structured log schema, RED and USE metrics, OpenTelemetry tracing, useful alerts and cost control.
Audit your nginx config and get findings ranked by severity plus a corrected, commented file: TLS, security headers, reverse proxy, rate limits, caching and redirects.
Create a secure, slim multi-stage Dockerfile and a docker-compose stack with database, cache and worker: non-root user, healthchecks, volumes and secrets kept out of the image.