Hong Kong faced about six new Covid-19 cases on Saturday, a source said, as residents who had potentially been exposed to the coronavirus and domestic helpers were screened at a temporary testing facility.Fewer than 10 preliminary cases were reported on Friday, including a patient linked to the disabled care home, Home of Treasure, in Kwai Chung.The city’s total number of confirmed cases stands at 5,169, with 105 related deaths.About 20 people queued up outside the new temporary testing site at…