Here are the requirements for a white-label solution:
1) Domain/subdomain with a CNAME record pointing to dsp-wl.eskimi.com (managed on domain's DNS management tool on client-side).
2) Transparent company logo for login page, best size 400x300.
3) Transparent company logo for top bar header, best size 100x40.
4) Favicon logo (if necessary).
5) Background, best size 1920x1080.
6) Adchoice logo size should be 15x15 (non-transparent image).
Information what is a CNAME: https://my.bluehost.com/hosting/help/cname
Method how you can set up a CNAME record for your domain: https://www.namecheap.com/support/knowledgebase/article.aspx/9646/10/how-can-i-set-up-a-cname-record-for-my-domain