coronavirus tests to go on sale nationwide, with stocks selling out within hours.Rival discounter Lidl meanwhile saw its website crash after it started offering at-home testing kits for sale online."We want to assure anyone who left empty-handed that new stocks are coming in the next days," an Aldi spokesman told the Bild newspaper.The German government is relying heavily on rapid tests to steer country through the next phase of the pandemic as citizens tire of coronavirus shutdowns but the pace of vaccinations remains sluggish.From Monday, all Germans will be entitled to one free rapid test a week, carried out by a professional at pharmacies or designated testing centres.Several manufacturers have also received regulatory approval for DIY.