By Lexi Vance  Epicenter and the Alchemist Accelerator are launching a new pre-accelerator program, called the Memphis Crucible.  “Getting accepted by a top-tier accelerator such as Alchemist requires careful preparation,” Managing Director of Alchemist Accelerator’s Memphis Hub Ido Sarig said.  This pre-accelerator program is designed to better instill a solid foundation for early-stage startups so…