The Doom 2016 OST can easily be bought from your music store of choice, and it's not difficult to find the other tracks. For copyright and bandwidth reasons, no music is provided.
Since this is based around Doom 2016, it assumes that you have access to the Doom 2016 OST as well as its ambient/miscellaneous tracks, and provides instructions for how to upload them to the PK3. It is based around Doom 2016 and is intended for use with Embers of Armageddon, but it can be used with any mod and any music from any game (or an arbitrary number of games or music sources).
This is instructions and a base file for how to build a universal dynamic music mod for Zdoom, which (like in Doom 2016) will automatically play combat music when the player is in combat or has recently been in combat, and play ambient music when all enemies are dead or the player has left combat for a period of time.