Hostname using raw adapter

[radeth]

Hi
I'm trying to send logs on remote machine using raw adapter. On my log machine im using ELK (logstash). I have received container name in go template but i cant recevice properly hostname. A "host" field is ip number instead of hostname. I tried receive hostname in go-template with i used in raw_format variable like this:

• "RAW_FORMAT={ "container": {{ toJSON .Container.Name }},"message": {{ toJSON .Data }},"hostname": {{ toJSON .Container.Config.Hostname }} }\n" but i receive "localhost"

here is my docker-compose.yaml file
version: "3"
networks:
logging:
services:
logspout:
image: gliderlabs/logspout:v3.2.12
command: 'raw+tcp://some.addres:5000'
environment:
- DEBUG=1
- "RAW_FORMAT={ "container": {{ toJSON .Container.Name }},"message": {{ toJSON .Data }},"hostname": {{ toJSON .Container.Config.Hostname }} }\n"
volumes:
- /etc/hostname:/etc/hostname
- /etc/hosts:/etc/hosts
- /var/run/docker.sock:/var/run/docker.sock
networks:
- logging