Bug report

Describe the bug

Hi, thanks for managing this great OSS project.

I am using Preact from NextJS example. NextJS only renders a blank page when:

• next dev
• there is an thrown error on page
• navigating on client-side

To Reproduce

Repo HERE

Steps to reproduce the behavior, please provi

Summary

PostCSS 8 was released. It added a new plugin API. Right now Gatsby does not support PostCSS 8 plugins.

Updating postcss-loader and adding postcss to dependencies for gatsby-plugin-postcss will fix the problem.

PostCSS 8 changelog does not have breaking changes related to Gatsby only removing Node.js 6 and 8 support

请不要直接在 issues 提交安全漏洞报告，目前已有一部分人正在使用该系统，你的公开提交很可能影响到他们的资料安全。

所以拜托以后直接发送安全漏洞信息到 [email protected] 谢谢！

Describe the bug

GitHub provides a few options when configuring a new repo like: license, .gitignore file, a README.md, and the Rennovate plugin. If you want to install any of these by default, which I usually do, then you get an error about the remote having newer content.

To Reproduce
Steps to reproduce the behavior:

1. Create a repo with a readme during the script
2. See the er