Enable Bluetooth streaming to LMS

Hello guys,

I noticed that picoreplayer and max2play have the feature to stream bluetooth audio from a phone to LMS/Squeezelite.
I could not find any tutorial on how to set this up on a headless raspian installation.
There are several other services running on my pi, so unfortunately I cannot just switch to the picoreplayer system.
Can anyone point me in the right direction how to achieve this?

Thank you in advance.