message: apps/server/README.md: add description for port error
diff: @@ -13,3 +13,19 @@ Limitations:
  To start the server on the target run the following command:
  ./aditof-server
  +
  +## Troubleshooting
  +
  +### Port error:
  +
  +`[2021/07/29 01:23:08:8024] NOTICE: Creating Vhost 'default' port 5000, 1 protocols, IPv6 off`
  +
  +`[2021/07/29 01:23:08:8027] ERR: ERROR on binding fd 6 to port 5000 (-1 98)`
  +
  +`[2021/07/29 01:23:08:8028] ERR: init server failed`
  +
  +`[2021/07/29 01:23:08:8029] ERR: Failed to create default vhost`
  +
  +If this error occurs please modify the port value from the following locations:
  +* apps/server/server.cpp
  +* sdk/src/connections/network/network.cpp
  