@angelod1as There's a few things you can do. If adding CSS is enough, you can use
registerPreviewStyle on the admin index.html page. Here's what I'm doing right now:
<!doctype html> <html> <head> <meta charset="utf-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0" /> <title>Content Manager</title> </head> <body> <script src="https://unpkg.com/netlify-cms@^2.0.0/dist/netlify-cms.js"></script> <script> CMS.registerPreviewStyle("/assets/css/base.css"); </script> </body> </html>
base.css is a stylesheet that is used on my main site.
config.ymlto tell it where the authentication app is?