This page contains some information about the Large Synoptic Survey Telescope (LSST) project.
Basic information about the project can be found at the LSST website. A useful resource regarding LSST design, capabilities, and science reach is the LSST Science Book 2.0. Some parts of this document require updating and revision, but it is still the first place to go to. A while ago, I put together a colloquium-level Guided Tour of the LSST Science Book, but it is also of the same vintage as the Science Book, so some caution is advised when looking over it.
A more focused view of LSST in terms of its dark energy investigation capabilities is provided in the LSST Dark Energy Science Collaboration White Paper, which also provides a more recent take on the relevant topics in the Science Book. The LSST-DESC welcomes new members, the relevant information is available here: Applying for DESC Membership.