How to display a subfolder index.php file

I have an independant webpage JS project that is within a subfolder of my Joomla site.  I currently display it via a menu item that opens it on a new browser tab page.  I have also displayed it in my Joomla site within an iframe wrapper; but it has some issues.  I can't get the height to be automatic and the frame is ugly.  I'm hoping that there is a way to solve these issues by displaying the page within a custom component instead; but I'm not sure how to implement this as I'm new to making Joomla components.  Should I start with an empty view component?  If so; then what?  Any suggestions...
Thanks in advance.