Meta, the social media giant formerly known as Facebook, is expanding its massive $1 billion data center under construction in DeKalb to nearly 2.4 million square feet, putting the college town west of Chicago at the center of its metaverse. Slated to open next year, the five-building complex filled with servers and other computing equipment will create 200 jobs and power everything from Facebook posts to Instagram photos as one of 17 Meta data centers across the U.S. “This is the physical backbone of all of our apps and services,” said Meta spokesman Tom Parnell. The expansion, announced Thur…