fixed issue: cannot start server w/o mineos.conf

The logic path for manually starting server.py never succeeded, as
misc.base_directory is referenced in mounts.py but is never set except
if an existing mineos.conf existed

server.py

@@ -185,7 +185,8 @@ if __name__ == "__main__":
             'server.socket_host': args.ip_address,
             'server.socket_port': int(args.port),
             'log.screen': not args.daemon,
-            'log.error_file': logfile
+            'log.error_file': logfile,
+            'misc.base_directory': base_dir
             }
 
         if not args.http: #use https instead