Water pump or front cover. It might even be coming down from the valley pan gasket.
Your sump gasket looks to be leaking also.
Water pump is easy. Worst bit is scraping off the old gasket. ~3 hours in my experiences.
Front cover is not so easy, but you'd replace the sump gasket, could do the water pump gasket in the process, and have the chance to change the timing chain & sprockets. ~6 hours.
Valley pan is easy. Worst bit is removing and replacing the coil packs and wires. Make sure to seal it up right when reassembling. ~5 hours.
If you don't just want to top off your fluids once in a while, then your best bet is to get a clear diagnosis before tearing things down. Get the workshop manual, the right tools and some patiences and you'll be fine. Any garage will fleece you at ~$70+ labor an hour. None of the parts are that expensive, your biggest cost will probably be on replacing the fluids.