Hello again,
I come back to this topic because after creating this new page successfully
to my main page, I have encountered problems when I wanted to modify it.
The thing is I want to be able to display specific data into my new page,
depending on the instance of jenkins.
I have tried to modify directly the file from my plugin, but the file seems
inaccessible.
I have tried to include an html file in an accessible directory into the
jelly, but the directory that I have to enter in the jelly is the full path
from my computer, which will not be accessible when my plugin is finished.
If anyone knows how I could do something like that, it would be great.