There are a number of ways to include your own pages in Nuke, one way is to use nukewrap, but I will show you a much simplier way.
Steps
Create a blank php file and place the following codes inside it. Remember to enclose the codes with the php tags.
Take a closer look at the codes, you will see that I basically wrapped the page with header and footer. All you need to do now is place your content where the text color is orange. You can use regular html like this.
Save the php file and upload to your nuke root folder where mainfile.php and index.php file is located. Link to your php file and enjoy your nuke page :)
That's all!!