Here are the steps on how to set up a custom logo for DGLux.
<server_root>/www/oem-login/images
(this step is required if you’re using file, not the external URL to the image later)."customLogo": "https://www.google.ca/images/branding/googlelogo/1x/googlelogo_color_272x92dp.png"
"customLogo": "../../oem-login/images/logo.png"
– path here points to the same folder from the previous step.You should see your logo on the login page and in the designer.