Is it possible to customize the content displayed on a webpage

[mattyx0011]

I have currently set everything up using Docker, but the webpage includes a 'nav-link go-pro-link' that links to 'stirlingpdf.com/pricing,' as well as a 'Powered by Stirling PDF' link that connects to an external URL. Could you please let me know if it’s possible to customize or remove these links? I would like to prevent users from clicking and uploading files to external URLs.
I will be grateful for any help you can provide..

<li><a class="footer-link px-2" id="survey" target="_blank" href="https://stirlingpdf.info/s/cm28y3niq000o56dv7liv8wsu">Survey</a></li>

<a href="https://stirlingpdf.com" class="stirling-link">Stirling PDF</a>

<a href="https://stirlingpdf.com/pricing" class="nav-link go-pro-link" target="_blank" rel="noopener noreferrer" <span class="go-pro-badge">Upgrade to Pro</span>>