Issue title: Add flow
 Issue body: That would really help I think.
 Comments: 
 Comment 0: Labeled this as a good first issue (with the caveat that it's only really good if you're experienced with flow already). It doesn't require you understand the existing codebase very well.
 Comment 1: Hi @kentcdodds . I would like to take this up!
 Comment 2: Go for it @bhargav175! 👍
 Comment 3: Awesome!
 Comment 4: We've got this. Just need to add annotations as we go!
{'source': 'GithubIssues', 'repo_name_with_owner': 'kentcdodds/glamorous-website', 'issue_id': 234981397, 'repo_stars': 104.0}