如何在Gatsby URL中添加发布日期？

// gatsby-config.js

module.exports = {
  // 其他配置项...
  plugins: [
    // 其他插件...
    {
      resolve: `gatsby-source-filesystem`,
      options: {
        name: `posts`,
        path: `${__dirname}/src/posts`,
      },
    },
    // 其他插件...
  ],
}

---
title: "我的博客文章"
date: "2022-01-01"
---

这是我的博客文章的内容。

// gatsby-node.js

const { createFilePath } = require(`gatsby-source-filesystem`)

exports.onCreateNode = ({ node, getNode, actions }) => {
  const { createNodeField } = actions

  if (node.internal.type === `MarkdownRemark`) {
    const slug = createFilePath({ node, getNode, basePath: `pages` })
    createNodeField({
      node,
      name: `slug`,
      value: slug,
    })
  }
}

// src/templates/blog-post.js

import React from "react"
import { graphql } from "gatsby"

export default function BlogPost({ data }) {
  const post = data.markdownRemark

  return (
    <div>
      <h1>{post.frontmatter.title}</h1>
      <p>{post.frontmatter.date}</p>
      <div dangerouslySetInnerHTML={{ __html: post.html }} />
    </div>
  )
}

export const query = graphql`
  query($slug: String!) {
    markdownRemark(fields: { slug: { eq: $slug } }) {
      html
      frontmatter {
        title
        date(formatString: "YYYY-MM-DD")
      }
    }
  }
`