Как установить флажок в качестве первого поля таблицы Bootstrap Vue

template: /*html*/`
    <div class = "mx-auto commodity card">
            <div class = "commodity__div-buttons">
                <div class = "commodity__buttons">
                    <b-button variant = "success">Add row</b-button> 
                    <b-button variant = "danger">Delete</b-button> 
                </div>
                <div class = "commodity__generate">
                    <b-button variant = "primary" @click = "getSessionStorageData">Generate</b-button> 
                </div>
            </div>

        <b-table striped hover responsive :fields = "fields" :items = "commodity_data">
            <template #cell(index) = "data">
                <input type = "checkbox">
            </template>
        </b-table>
    </div>
    `,
    data() {
        return {
            commodity_data: [],
            fields: [
                'index',
                {
                    key: 'hu_count',
                    label: 'Hu Count'
                },
                {
                    key: 'dimensions',
                    label: 'Dimensions'
                },
                {
                    key: 'weight',
                    label: 'Weight'
                }
            ]
        }
    }