Next.js "New Post" Node Script

new-post.js

const fs = require("fs");
const slugify = require("slug");
const inquirer = require("inquirer");
const open = require("open");

// Register datepicker plugin for inquirer
inquirer.registerPrompt("datetime", require("inquirer-datepicker-prompt"));

inquirer
  .prompt([
    {
      type: "input",
      name: "title",
      message: "Title"
    },
    {
      type: "input",
      name: "slug",
      default: answers => slugify(answers.title.toLowerCase()),
      message: "Slug"
    },
    {
      type: "input",
      name: "desc",
      message: "Description"
    },
    {
      type: "confirm",
      name: "draft",
      default: true,
      message: "Is Draft?"
    },
    {
      type: "confirm",
      name: "published",
      default: false,
      message: "Is Published?"
    },
    {
      type: "checkbox",
      message: "Select categories",
      name: "categories",
      choices: [
        { name: "JavaScript" },
        { name: "React" },
        { name: "CSS" },
        { name: "Comic" },
        { name: "Neovim" },
        { name: "Vim" },
        { name: "Command Line" }
      ],
      validate: answer =>
        answer.length ? true : "You must choose at least one category"
    },
    {
      type: "datetime",
      name: "date",
      message: "When would you like the post to be published?",
      format: ["yyyy", "/", "mm", "/", "dd"]
    }
  ])
  .then(answers => {
    const { slug, date, title, desc, categories, draft, published } = answers;
    date.setHours(12, 0, 0, 0);
    const fileName = `/posts/${slug}.mdx`;
    if (fs.existsSync(fileName)) {
      throw "That post already exists!";
    }
    fs.writeFileSync(
      `posts/${ slug }.mdx`,
      `---
slug: "${slug}"
date: "${date.toISOString()}"
title: "${title}"
description: "${desc}"
categories: ${JSON.stringify(categories)}
draft: ${draft}
published: ${published}
---

## Introduction
`);
    fs.mkdirSync(`public/images/${slug}`, { recursive: true });
    console.log(`\n${slug} was created!`);
    open(`http://localhost:3000/blog/${slug}`);
  });