final touches for beta skymoney (at least i think)

scripts/backup.sh

@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+if [[ -z "${DATABASE_URL:-}" && -z "${BACKUP_DATABASE_URL:-}" ]]; then
+  echo "DATABASE_URL or BACKUP_DATABASE_URL is required."
+  exit 1
+fi
+
+ENV_FILE="${ENV_FILE:-./.env}"
+if [[ -f "$ENV_FILE" ]]; then
+  set -a
+  # shellcheck source=/dev/null
+  . "$ENV_FILE"
+  set +a
+fi
+
+OUT_DIR="${BACKUP_DIR:-./backups}"
+mkdir -p "$OUT_DIR"
+
+STAMP="$(date +%F_%H%M%S)"
+OUT_FILE="${OUT_DIR}/skymoney_${STAMP}.dump"
+
+pg_dump "${BACKUP_DATABASE_URL:-$DATABASE_URL}" -Fc -f "$OUT_FILE"
+
+echo "Backup written to: $OUT_FILE"