A website like searchingforsyria - Tech recommendations

Hello everyone,
Until recently there a website https://www.searchingforsyria.org/ which now is no longer active. A video of the tablet/desktop experience, however, exists on YouTube: https://youtu.be/n445TTqYtww
I needed to design and develop something like this but don’t know what libraries to use. I’ll be very grateful if someone can point me to a good resource to achieve this. Many thanks!