Images appear to be missing on VPS pages #151

Describe the bug

When opening this page directly:
https://docs.dappnode.io/user-guide/ui/recommended-set-ups/add-vpn-devices/

The images do not show.

From Chrome latest and iOS Safari v15.4

To Reproduce

1. Click on this link: https://docs.dappnode.io/user-guide/ui/recommended-set-ups/add-vpn-devices/

Expected behaviour

The image should show up correctly.

Screenshots

DAppNode version:

• not relevant -

Additional context

It looks like if you are navigating on the website and coming from another page, the image will show. But if you access the page directly or refresh the page, then the images won't show.

I recommend to use /img/XXXX instead of ../../../img/

You can see from the source that the images src are not consistent. Sometimes it uses ../../../../img and sometimes it uses ../../../img

This image seems to also be impacted:
https://github.com/dappnode/DAppNodeDocs/blob/master/docs/user-guide/ui/access/vpn.md?plain=1#L32

A PR has been created here:
#150