rebar.config

{erl_opts, [debug_info, warnings_as_errors]}.
{deps,
 [
  {folsom, "~>0.8.3"},
  {ddb_client, "~>0.5.0"},
  {dqe_idx, "~>0.3.0"},
  {dqe_idx_pg, "~>0.4.0"},
  {dqe_idx_ddb, "~>0.4.0"}
 ]}.