The thread is about Dogecoin specifically, not Doge in general. Here's the creators of Dogecoin talking about it.
Jackson Palmer (JP): 'Officially' it's something like 'dohjcoin', coming from the Homestar Runner pronunciation that Strong Bad gave it. I've pronounced it every way though, do-ge coin, dog-coin, doggy-coin, etc. Whatever is the most amusing at the time.
Billy Markus (BM): I originally started pronouncing it with a hard "g" but have recently moved toward a softer "g" sound - like when you say "giraffe". Check out my video where I pronounce it
He put "officially" in quotes suggesting that it really doesn't matter and they don't particularly care