Dockerize Django app with dev/beta/prod env config and uv (#6)

## Summary

- Containerize the Django app with Docker and docker-compose (dev + production)
- Refactor settings into `dev` / `beta` / `prod` environments driven by environment variables
- Connect to PostgreSQL via `DATABASE_URL` or `DB_*` vars
- Migrate package management from pip to uv (`pyproject.toml`, `uv.lock`)
- Split Gitea workflows: PRs run unit tests only; pushes to `master` run tests, Docker validation, and deploy
- Update deploy script to rsync code, preserve server `.env`, validate config, and run Docker compose

Closes #4

## Test plan

- [x] `uv run python manage.py test` passes locally (10/10)
- [x] `DJANGO_ENV=beta` and `DJANGO_ENV=prod` load with correct logging levels
- [x] `scripts/validate-env.sh` rejects missing production variables
- [ ] `docker compose up --build` starts app + Postgres locally
- [ ] Containerized unit tests pass in CI Docker job
- [ ] Server `.env` created from `.env.prod.example` before first production deploy
- [ ] CI workflow runs on this PR (tests only, no deploy)

Reviewed-on: #6

scripts/deploy.sh

@@ -2,10 +2,9 @@
 set -euo pipefail
 
 REPO_ROOT="/home/westfarn/Documents/django_live_sites/Company_Site"
-APP_DIR="$REPO_ROOT/company_site"
-VENV="$REPO_ROOT/venv"
-SETTINGS="$APP_DIR/company_site/settings.py"
-LOCAL_SETTINGS="$APP_DIR/company_site/local_settings.py"
+ENV_FILE="$REPO_ROOT/.env"
+COMPOSE_FILE="$REPO_ROOT/docker-compose.prod.yml"
+VALIDATE_SCRIPT="$REPO_ROOT/scripts/validate-env.sh"
 
 if [[ $# -lt 1 || -z "${1:-}" ]]; then
   echo "Usage: $0 <checkout-directory>" >&2
@@ -13,24 +12,67 @@ if [[ $# -lt 1 || -z "${1:-}" ]]; then
 fi
 
 CHECKOUT="$1"
+DEPLOY_MODE="${DEPLOY_MODE:-docker}"
 
-cp "$SETTINGS" /tmp/company_site_settings.py.bak
+if [[ "$DEPLOY_MODE" == "docker" ]]; then
+  echo "Syncing application files to $REPO_ROOT (preserving server .env)..."
+  rsync -a --delete \
+    --exclude .git/ \
+    --exclude .venv/ \
+    --exclude .env \
+    --exclude db.sqlite3 \
+    --exclude staticfiles/ \
+    "$CHECKOUT/" "$REPO_ROOT/"
+
+  if [[ ! -f "$ENV_FILE" ]]; then
+    echo "Missing $ENV_FILE on the server." >&2
+    echo "Create it from .env.prod.example and configure production values." >&2
+    exit 1
+  fi
+
+  bash "$VALIDATE_SCRIPT" "$ENV_FILE"
+
+  cd "$REPO_ROOT"
+
+  echo "Building Docker images..."
+  docker compose -f "$COMPOSE_FILE" --env-file "$ENV_FILE" build
+
+  echo "Starting containers..."
+  docker compose -f "$COMPOSE_FILE" --env-file "$ENV_FILE" up -d --remove-orphans
+
+  echo "Running database migrations..."
+  docker compose -f "$COMPOSE_FILE" --env-file "$ENV_FILE" exec -T web \
+    uv run python manage.py migrate --noinput
+
+  echo "Deploy complete."
+  docker compose -f "$COMPOSE_FILE" --env-file "$ENV_FILE" ps
+  exit 0
+fi
+
+# Legacy venv/systemd deploy (DEPLOY_MODE=legacy)
+APP_DIR="$REPO_ROOT/company_site"
+VENV="$REPO_ROOT/.venv"
+SETTINGS_DIR="$APP_DIR/company_site/settings"
+LOCAL_SETTINGS="$APP_DIR/company_site/local_settings.py"
+
+cp -r "$SETTINGS_DIR" /tmp/company_site_settings.bak
 cp "$LOCAL_SETTINGS" /tmp/company_site_local_settings.py.bak 2>/dev/null || true
 
 rsync -a --delete \
-  --exclude venv/ \
+  --exclude .venv/ \
   --exclude .git/ \
-  --exclude 'company_site/company_site/settings.py' \
+  --exclude .env \
+  --exclude 'company_site/company_site/settings/' \
   --exclude 'company_site/company_site/local_settings.py' \
   "$CHECKOUT/" "$REPO_ROOT/"
 
-cp /tmp/company_site_settings.py.bak "$SETTINGS"
+rm -rf "$SETTINGS_DIR"
+cp -r /tmp/company_site_settings.bak "$SETTINGS_DIR"
 cp /tmp/company_site_local_settings.py.bak "$LOCAL_SETTINGS" 2>/dev/null || true
 
-source "$VENV/bin/activate"
-pip install -r "$REPO_ROOT/requirements.txt"
+uv sync --frozen --directory "$REPO_ROOT"
 cd "$APP_DIR"
-python manage.py migrate --noinput
-python manage.py collectstatic --noinput
+uv run python manage.py migrate --noinput
+uv run python manage.py collectstatic --noinput
 
 sudo systemctl restart company