How can I run a simple app on my localhost with database integration?

For some context, I'm having a party and it needs a scoring system for teams. So I've got a database and running which can store the score and the team ID, but I want to host a little app so that people (from their phones) can go to 127.0.0.1 in their browser and it will show up. Do I need a server to do this? If so, can someone point me in the right direction? Thanks.

I can write the HTML/CSS/JS app myself, but it's the access I need help with.