Vivliostyle・手動で目次を作る

module.exports = {
    entry: ["cover/section_main_title.md",
        {
            path: 'outline.md',
            rel: 'contents'
        },
         "introduction.md", "cover/section1.md", "chapter1.md", "cover/section2.md",
        "chapter2.md", "cover/section3.md", "chapter3.md",],
};