local WiFi AP on debianraspbian

I wish to have a standalone app running on a raspberry pi (or anything similar with debian as OS). In addition, I would like to have a web server running on it, displaying app results. On top I would want this to be completely offline.
So in order to achieve this I wish to have the following:

  1. A debian running machine (possibly a raspberry pi), broadcasting WiFi (let’s say “My_SSID”, with or without WPA key, doesn’t matter)
  2. A client with a mobile phone or whatever
  3. The clients connects to “My_SSID”, receives an IP address and opens a browser at myapp.local to see the app results.

My problem is that I would like to have a running AP on the pi, and I can’t seemed to make it work. I tried using PyAccessPoint but nothing is broadcasting an SSID. So I also tried running an AP using hostapd, but the service would not start (I tried this, but without bridge). I tried a, b and g hardeare modes, but still no luck.

One thing though, I tried all these on my laptop running debian live, but I don’t think this should be a problem.