How to locate where the coolant is leaking from?

Hello,

If the coolant leaks out this fast it could be cracked radiator, reservoir or a hose even.

So, when you add coolant, it just drains out?
Is it from the front or the back?

The best course of action would be to inspect under the hood and see if you are able to locate the leak. As you know the leak could be from any number of components.

Take a look at this guide, it covers the typical coolant leak areas:

https://www.2carpros.com/articles/car-is-leaking-coolant

Please let me know if you have any questions.
Thank you.

I've seen dripping in the front and also in the back towards the firewall middle underneath.

Front leak could be from the radiator hose or even the radiator and the rear one likely one of the coolant bypass hose.
Were you able to inspect under the hood to see if you are able to locate the leak?