feat: ship blog platform admin and deploy stack

deploy/scripts/backup/backup-postgres.sh

@@ -0,0 +1,19 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+BACKUP_DIR="${BACKUP_DIR:-./backups/postgres}"
+RETENTION_DAYS="${RETENTION_DAYS:-14}"
+TIMESTAMP="$(date -u +%Y%m%dT%H%M%SZ)"
+FILE_PATH="${BACKUP_DIR}/postgres-${TIMESTAMP}.dump"
+
+if [[ -z "${DATABASE_URL:-}" ]]; then
+  echo "DATABASE_URL is required" >&2
+  exit 1
+fi
+
+mkdir -p "${BACKUP_DIR}"
+pg_dump --format=custom --file="${FILE_PATH}" "${DATABASE_URL}"
+ln -sfn "$(basename "${FILE_PATH}")" "${BACKUP_DIR}/latest.dump"
+find "${BACKUP_DIR}" -type f -name 'postgres-*.dump' -mtime +"${RETENTION_DAYS}" -delete
+
+echo "Postgres backup written to ${FILE_PATH}"