add some initial standalone raft node code

tests/raft_test_node_standalone.nim

@@ -1,6 +1,27 @@
 import ../raft
 import basic_state_machine
+import std/json
+import uuids
+import chronicles
 
+type
+  RaftPeerConf = object
+    id: UUID
+    host: string
+    port: int
+
+  RaftPeersConfContainer = seq[RaftPeerConf]
+
+var
+  conf: RaftPeersConfContainer
+
+proc loadConfig() =
+  let jsonFile = "raft_node_config.json"
+  # read and parse file
+  let jsConf = parseFile(jsonFile)
+  for n in jsConf["raftPeers"]:
+    conf.add(RaftPeerConf(id: parseUUID(n["id"].astToStr), host: n["host"].astToStr, port: int(n["port"].astToStr)))
+  info "Conf", config=repr(conf)
 
 if isMainModule:
   var node = RaftNode[SmCommand, SmState].new()