To add a new page with your own HTML code:
Go to the Admin Panel and select "CMS" -> "Pages".
Add a new page and enter its title.
Paste the HTML code: Click the edit icon to paste the code on the page.
Save changes, by clicking "Add".
Preview the page: Click the "eye" icon next to the title to see how it looks.
Edit the page: Use the edit icon to change the content or URL.
The added link will be in the format twojadomena.pl/przykladowyurl.
By clicking on the icon visible in the picture, you will see the previously added code - you can edit it or paste a new one in its place.
You can edit the link path to a given page - by entering your text in the "URL" field.
In the case of the picture - the link will look like this: twojadomena.pl/przykladowyurl