Build a Website

I have multiple raspberry pi's deployed running nagios. I would like to have a website on a dedicated pi that has a webpage that will display the issues for each site. It would basically grab data from the webpage on each of the pi's and bring them all together to display it on one webpage. Included with each customer there should be a button that hyperlinks to the polled page. As I deploy each additional pi, I need an easy way to add them to be polled and displayed on the website. Additionally, the website should have security, perhaps a users page to add delete who can view this data. Please contact me for a test website to grab the data.