gitignore and a sleep time for liveness checker

.gitignore

@@ -6,3 +6,5 @@ app/statsmetrics
 app/statsmetrics.txt
 app/threads
 app/threads.txt
+app/vrametrics
+app/vrametrics.txt

app/python-node-exporter.py

@@ -638,6 +638,7 @@ webserver_thread = start_thread(WebServer)
 # loop indefinitely
 while True:
     # check if any thread has crashed
+    sleep(2)
     if not probe_thread.is_alive():
         # restart the thread
         log.error("Probe Thread Died - Restarting")