**Do you want to request a *feature* or report a *bug*?**
Bug

**What is the current behavior?**
The documentation for [warnings](https://github.com/facebook/react/tree/master/docs/warnings) returns a 404

**If the current behavior is a bug, please provide the steps to reproduce and if possible a minimal demo of the problem via https://jsfiddle.net or similar (template: https://jsfiddle.net/ebsrpraL/).**
https://cl.ly/080p0f1t400y

**What is the expected behavior?**
Redirect to correct documentation.

~~**Which versions of React, and which browser / OS are affected by this issue? Did this work in previous versions of React?**~~

---
The workaround is to look at the cached version from a google search or check for markdown [here](https://github.com/facebook/react/tree/master/docs/warnings).
context: {
            slug,
          },
        });
      
      createArticlePage(slug);
      
      if (edge.node.fields.redirect) {
        let redirect = JSON.parse(edge.node.fields.redirect);
        if (!Array.isArray(redirect)) {
          redirect = [redirect];
        }
        redirect.forEach(fromPath =>
          createRedirect({
            fromPath: `/${fromPath}`,
            redirectInBrowser: true,
            toPath: `/${slug}`,
          }),
        );
      }
    }
  });
  const newestBlogEntry = await graphql(
    `
    {
      allMarkdownRemark(
        limit: 1,
        filter: { id: { regex: "/_posts/" } }
        sort: { fields: [fields___date], order: DESC }
      ) {