The Katie Moore Foundation, founded and named in memory of Rangers’ center Dominic Moore’s wife, who passed away on Jan. 7 at age 32 with a rare form of liver cancer, is dedicated to helping patients and families with rare cancers through research, advocacy and community. The Foundation’s credo, as stated on its website, is “One Day at a Time.” It is the way Dominic Moore, who on July 5 signed a one-year free agent contract with the Rangers after sitting out last season, lives his life. “I don’t try to get ahead of myself,” Moore said on a conference call yesterday in an attempt to explain the thought process that brought him back to the NHL and the organization with which he started his pro career a decade ago. “If there is one thing this process has taught me, it’s to take one day at a time, and that’s what I’ve been doing. “I don’t worry about what could happen too far down the road. It’s been good for me not to focus on what I can’t control.” Dominic and Katie met as Harvard undergrads at the beginning of the millennium. They were married on July 3, 2010. She was diagnosed in the late spring of 2012 with fibrolamellar hepatocellular carcinoma. Then a member of the Sharks, Moore took a leave of absence during the playoffs to be at his wife’s side following surgery before missing last season in the aftermath of her passing on the day after the lockout was settled. Moore, who played one full season with the Blueshirts in 2005-06 before he was sent to Pittsburgh via Nashville in a three-way trade that would lead to a nine-team odyssey around the league, had been talking to the Rangers about returning as a free agent last year. When asked what the last year has been like for him, the center, who will turn 33 next month, said, “That’s a question that could probably take a lifetime to answer. “The ups and downs over the course of dealing with the disease and what we went through, that’s a lot to try and describe in one simple answer,” he said. “I’m grateful for the time we had; those months were the most special months we had with each other or that anyone could possibly ask for despite it being the most difficult few months anyone could deal with.”