#The Golem would ignite

[...] If the target is a creature or a flammable object, it ignites. [...]

A Golem is a creature (specifically a construct).

So it will ignite. The flammable question only becomes relevant if you are talking about objects.

The Golem would ignite

[...] If the target is a creature or a flammable object, it ignites. [...]

A Golem is a creature (specifically a construct).

So it will ignite. The flammable question only becomes relevant if you are talking about objects.