**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).
componentDidMount() {
    
    
    
    docsearch({
      apiKey: '36221914cce388c46d0420343e0bb32e',
      indexName: 'react',
      inputSelector: '#algolia-doc-search',
    });
  }
  render() {
    const {children, location} = this.props;
    
    let layoutHasSidebar = false;
    if (
      location.pathname.match(/^\/(docs|tutorial|community|blog|contributing)/)
    ) {
      layoutHasSidebar = true;
    }
    return (
      <div