Small piece of feedback but I would increase the contrast of your fonts to make it a bit easier to read (it's far from the worst I've seen but if you compare it to the DO community you link to, theirs is easier to read).
Also, the home view eg. https://slack.haash.io/ feels quite wide and is hard to look across to see the 'Date' and 'Views' which are all the way to the right. When you click into a question eg. https://slack.haash.io/151/how-can-remove-files-that-deactiv... this width seems good and is easier to scan.
Overall I like the clean and simple approach. Very little noise to distract you which is nice.