Email Reports using IP address for image URLs

I've setup a Community Countly install with DigitalOcean, all is working well. The only issue I'm noticing is that, in the email reports the images are missing. The problem seems to be caused by the image URLs referencing the server IP address, rather than the domain name. Is there some configuration I need to modify?

Hello, yes
Under top cog -> Configurations -> API -> Server URL (used in outgoing emails)

Thank you, that was easy enough.