Ruby Supreme is a shy bearer for me but the fruit is very good. I grow mine in a container as well and move it to my unheated garage for the colder months(Nov-Mar). If I am lucky they flower around May which will give me fruits around September or October. This year I had 8 or so fruits.
I would prune yours just before spring when it is about to start growing. This way you will have more branches that could have flowers and also control height.
I had a scare a few days ago. I went out to the gh and all the tips were wilted. I thought frost? I checked the weather it only went dow to 44 or something. Then I noticed it was bone dry. In three days it dried up completely. I now am seeing what people were saying about it being a water hog.