feat: Release version 1.3.1 with Docker optimization and comprehensive documentation

- Update version to 1.3.1 in package.json and docker-compose.yml
- Optimize Dockerfile with proper data directory structure for production
- Add comprehensive Docker documentation (DOCKER.md)
- Include deployment and backup scripts (deploy.sh, backup.sh)
- Add .env.example for environment configuration
- Improve README with detailed deployment instructions
- Fix database path handling for Docker production environment
- Add health checks and proper Docker Compose configuration
- Remove development task documentation
- Update .gitignore to exclude backup directories

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

backup.sh

@@ -0,0 +1,53 @@
+#!/bin/bash
+
+# Script de backup para AP-POS
+# Crea backup de la base de datos SQLite
+
+set -e
+
+BACKUP_DIR="./backups"
+TIMESTAMP=$(date +%Y%m%d_%H%M%S)
+BACKUP_FILE="backup-ap-pos-${TIMESTAMP}.db"
+
+echo "💾 Creando backup de la base de datos AP-POS..."
+
+# Crear directorio de backups si no existe
+mkdir -p "$BACKUP_DIR"
+
+# Verificar que el contenedor esté corriendo
+if ! docker compose ps ap-pos | grep -q "running"; then
+    echo "❌ Error: El contenedor ap-pos no está corriendo"
+    echo "   Ejecuta: docker compose up -d"
+    exit 1
+fi
+
+# Crear backup desde el contenedor
+echo "📋 Copiando base de datos..."
+docker compose exec -T ap-pos cp /app/data/ap-pos.db /tmp/backup.db
+
+# Copiar al host
+docker compose cp ap-pos:/tmp/backup.db "${BACKUP_DIR}/${BACKUP_FILE}"
+
+# Limpiar archivo temporal
+docker compose exec -T ap-pos rm /tmp/backup.db
+
+# Verificar que el backup se creó correctamente
+if [ -f "${BACKUP_DIR}/${BACKUP_FILE}" ]; then
+    BACKUP_SIZE=$(ls -lh "${BACKUP_DIR}/${BACKUP_FILE}" | awk '{print $5}')
+    echo "✅ Backup creado exitosamente:"
+    echo "   📁 Archivo: ${BACKUP_DIR}/${BACKUP_FILE}"
+    echo "   📊 Tamaño: ${BACKUP_SIZE}"
+    
+    # Mostrar backups disponibles
+    echo ""
+    echo "📂 Backups disponibles:"
+    ls -lht "${BACKUP_DIR}"/ | head -10
+else
+    echo "❌ Error: No se pudo crear el backup"
+    exit 1
+fi
+
+# Opcional: Limpiar backups antiguos (mantener solo los últimos 10)
+echo "🧹 Limpiando backups antiguos (manteniendo los últimos 10)..."
+ls -t "${BACKUP_DIR}"/backup-ap-pos-*.db 2>/dev/null | tail -n +11 | xargs -r rm
+echo "✅ Limpieza completada"