Add opening pid file and writing pid to it for issue #8

.gitignore

@@ -105,4 +105,5 @@ venv.bak/
 .mypy_cache/
 
 # database
-makermon.db
+makermon.db
+m_server.pid

main.py

@@ -1,12 +1,17 @@
 import os
+import sys
 import sqlite3
 import tornado.ioloop
 import tornado.web
 
 import database
 import uimodules
 
+
 PATH = os.path.dirname(os.path.realpath(__file__))
+pid = str( os.getpid() )
+pid_file = open( 'm_server.pid', 'r+' )
+pid_file.write( pid )
 
 class MainHandler(tornado.web.RequestHandler):
     def get(self):