khalyomede/gridsome-plugin-manifest

const GridsomePluginManifest = (Vue, options, { head }): void => {
    if (process.isServer) {
        head.link.push({
            rel: "manifest",
            type: "application/manifest+json",
            href: `/${options.file_name}`,
        });
    }

    head.meta.push({
        name: "theme-color",
        content: options.theme_color,
    });
};

export default GridsomePluginManifest;