Custom-logo (and -text) for Client-portal-login-website

[n1smithy]

**What version of Invoice Ninja are you running? v5

What environment are you running?
Docker

Have you searched existing issues/requests?
yes

Additional context
It would be great to customize easily the portal-webpage. Exspecially the Invoice-Ninja-logo is predestined to confuse customers a lot! So at least I always change the logo-file used for this webpage to the above shown one. So my customers won't have to be afraid of a phishing-attack or some other hacking-try.

[turbo124]

The left image only appears if there is no white label license applied.

When white label license is applied this image is removed completely.

[mwa85]

@n1smithy

I can confirm that purchasing a White-label-license for only $30 per year removes invoiceninja branding and it works like a charm ;)