Why url mostly uses certain domain **https://www.eclipse.dev**

[KonstantinBYvitebsk]

About Hawkbit-website
For example I see url
https://www.eclipse.dev/hawkbit/javascripts/modernizr.js
I would propose to delete part: https://www.eclipse.dev
Actually I tried to use the site on my own PC and found that sometimes I am redirected to https://www.eclipse.dev instead of remain on own PC.
I have used the deliting command:
find . -type f | xargs sed -i 's/https:\/\/www.eclipse.org//g'
It helps me. And all I need works perfrectly. I am sure that I deletes and links that shouldn't be deleted.
But I have question: is there any reason that the almost all links a absolute? May be most of them should be changed to relative URL.