CDN configuration (for delivery of your Prebid.js build and other files) is available under the Admin -> CDN menu. The CDN is automatically set up to serve your Prebid.js builds, as well as other custom files if desired. The CDN Settings have been configured in advance by Relevant Digital and should only be modified if you have specific requirements.
You may also upload and maintain custom files to be served through the CDN (such as ads.txt, etc) through this interface. This can be useful if you desire a simple way to edit and manage these files on the fly, without forcing you to go through a lengthy internal process.
ads.txt (Authorized Digital Sellers) and sellers.json
A template is available for managing your ads.txt through this interface. Press "Upload File" and choose "ads.txt (Authorized Digital Sellers)" in the "Type" field. After saving, your ads.txt will be available at the public URL shown.
Details on the Authorized Digital Sellers format is available here: https://iabtechlab.com/wp-content/uploads/2022/04/Ads.txt-1.1.pdf
Note: To make your changes accessible through your domain, an initial setup step requires an administrator of your domain to create a proxy/redirect to replicate your file's URL on the CDN (for example, https://yourdomain.com/ads.txt to https://your-cdn.relevant-digital.com/static/custom/ads.txt).
Similarily you can also create your Sellers.json and publish it through the CDN.