text: 
  exports.up = knex => knex.schema.createTable("product", tb => {
      tb.increments("idproduct")
      tb.string("nameproduct").notNullable()
      tb.timestamp("dtcreationproduct").notNullable().defaultTo(knex.fn.now())
  })
  
  exports.down = function(knex, Promise) {
      return knex.schema.dropTable("product")
  };
  