BERLIN—German industrial orders grew more than expected in December, data showed on Friday, with a boost from stronger domestic demand a cause for optimism for the growth outlook of Europe’s largest economy. Orders for goods grew 2.8 percent on the month in seasonally adjusted terms after a revised increase of 3.6 percent in November, figures from the Federal Statistics Office showed. A Reuters poll of analysts had pointed to a smaller increase of 0.5 percent on the month. Domestic orders saw an increase of 11.7 percent on the month. Orders from the rest of the eurozone decreased 4.2 percent in December after an increase the previous month of 13.1 percent. “Companies are clearly geared up for a recovery and are sitting in the starting blocks for an upswing,” said LBBW analyst Jens-Oliver Niklasch. “What we need now, above all, is an end to coronavirus restrictions and security in the supply …