add script to backup database

Author: ffreddow

scripts/backup_database.sh

@@ -0,0 +1,30 @@
+#!/bin/bash
+
+# PostgreSQL Database Backup Script
+# This script creates a database backup using docker exec and rotates old backups
+# keeping only the last 365 backup files.
+
+set -e
+
+# Configuration
+BACKUP_DIR="$HOME/backups"
+CONTAINER_NAME="postgres"
+DB_USER=$(grep -E '^POSTGRES_USER=' "$(dirname "$0")/../docker/.env" | cut -d'=' -f2-)
+TIMESTAMP=$(date +"%Y%m%d_%H%M%S")
+BACKUP_FILE="$BACKUP_DIR/postgres_backup_$TIMESTAMP.sql"
+KEEP_DAYS=364
+
+# Create backup directory if it doesn't exist
+mkdir -p "$BACKUP_DIR"
+
+# Perform the database backup
+docker exec -t "$CONTAINER_NAME" pg_dump -U "$DB_USER" > "$BACKUP_FILE"
+
+
+# Rotate backups - keep only the last 365 files
+cd "$BACKUP_DIR"
+BACKUP_COUNT=$(ls -1 postgres_backup_*.sql 2>/dev/null | wc -l)
+
+    # Delete old backups, keeping only the most recent 365
+ls -1t postgres_backup_*.sql | tail -n +$((KEEP_DAYS + 1)) | xargs rm -f
+DELETED_COUNT=$((BACKUP_COUNT - KEEP_DAYS))