# Deployment

## Local environment

Copy `.env.example` to `.env`, replace the development placeholders, then run:

```bash
cp .env.example .env
docker compose up --build -d
docker compose ps
docker compose exec backend python manage.py seed_demo
```

The backend applies migrations and collects static files before starting Gunicorn.
All services have health checks; wait for healthy status before opening the site.

Compose exposes the Astro site on loopback port `4321` and Django/Wagtail on loopback
port `8000`. PostgreSQL is available only on the Compose network. `postgres_data` and
`media_data` are persistent named volumes.

The stack uses explicit PostgreSQL 16.9, Python 3.12.12, and Node.js 22.20 image
versions. Containers are not privileged and use `no-new-privileges`.

Required runtime variables are `DATABASE_URL`, `DJANGO_SECRET_KEY`, `DJANGO_DEBUG`,
`DJANGO_ALLOWED_HOSTS`, `WAGTAILADMIN_BASE_URL`, and `PUBLIC_CMS_API_URL`. PostgreSQL
bootstrap variables are also documented in `.env.example`. Do not use the example
credentials outside local development.

`WAGTAILADMIN_BASE_URL` must be browser-reachable because it is used for media URLs.
`PUBLIC_CMS_API_URL` must be reachable by Astro; within Compose it is
`http://backend:8000`.

## Production boundary

The Compose stack is a local development deployment. A public environment still needs
TLS termination, production static/media serving, restricted admin access, managed
secrets, off-host backups, monitoring, and an explicit domain/allowed-host policy.

## Rollback

Revert the application commit and rebuild images. Keep the database and media volumes
unless content deletion is intentional. Schema rollback must be evaluated per Django
migration; take coordinated database and media backups first.