index.html poping as a download file

[FBOURAS]

Hi, I was trying the app, which i found awesome. My plan is to run a miniwebsite inside the classroom using my Andro-mobile and school wifinetwork.
While testing: Opening my Firefox and writing the local server address and port (example : 192.168.1.110:8080) nothing is loading.
If i write : 192.168.1.110:8080/ inde (purposefully wrong) -> i get the 404 page which a good sign.
if i write : 192.168.1.110:8080/index.html -> rather than opening the page on the Firefox, i get download pop message.
Also, it is possible to navigate between page inside the same root directory and is this code supporting php, apache, sql??