Antifreeze leak coming from engine
 

I took a look at the engine and noticed a small puddle laying within the engine.
I've linked a picture to show you what I mean.

I've read about the intake gasket being a common problem so I was hoping if someone here could tell if this is the case from the picture I've linked.

I know that the cost of repairing something like this is pricey so I was also wondering if I could use a leak fixing additive to my coolant or if you think this could cause more damage?

Thanks for the help.