Can we add docker log option to [OUTPUT] by using [MODIFY] or whatever?

[datbv]

• fluent-bit.conf

[SERVICE]
    Flush     2
    Daemon    off
    Log_Level info

[INPUT]
    Name      forward


[OUTPUT]
    Name      stdout
    Match     *

• Fluent-bit running

docker run -it --rm -p 24224:24224 -v .../config:/fluent-bit/etc fluent/fluent-bit:latest
Fluent Bit v1.3.6
Copyright (C) Treasure Data

[2020/02/20 07:17:27] [ info] [storage] initializing...
[2020/02/20 07:17:27] [ info] [storage] in-memory
[2020/02/20 07:17:27] [ info] [storage] normal synchronization mode, checksum disabled, max_chunks_up=128
[2020/02/20 07:17:27] [ info] [engine] started (pid=1)
[2020/02/20 07:17:27] [ info] [in_fw] binding 0.0.0.0:24224
[2020/02/20 07:17:27] [ info] [sp] stream processor started

• Start a container with log

docker run -it --rm --log-driver=fluentd --log-opt tag="some-tag" -t ubuntu echo "print something"
print something

• Here is log from fluent-bit container

some-tag: [1582183276.000000000, {"container_id"=>"0027ad71f4f51df65633608d5174b7712d9d2f691436f4fa2852e40c25267d90", "container_name"=>"/lucid_wiles", "source"=>"stdout", "log"=>"test
"}]

• The question is how can I pass some-tag into log info such as. We can do it with fluentd, but how in fluent-bit

some-tag: [1582183276.000000000, {"container_id"=>"0027ad71f4f51df65633608d5174b7712d9d2f691436f4fa2852e40c25267d90", "container_name"=>"/lucid_wiles", "source"=>"stdout", "log"=>"test", "tag"=>"some-tag"}]