docker-log-centralizer/logstash-forwarder/config/config.json

{
    "network": {
        "servers": [ "shipper:5043" ],
		"ssl key": "/etc/ssl/selfsigned.key",
        "ssl ca": "/etc/ssl/selfsigned.crt"
    },
    "files": [
        {
            "paths":  [ "/var/log/random/*.log" ],
            "fields": { "type": "random-forwarder" }
        },
		{
            "paths":  [ "/var/log/apache/*.log" ],
            "fields": { "type": "apache-forwarder" }
        }
    ]
}