What is the method to eliminate the tail and timestamp from the output of fluentbit's stdout?

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To eliminate the tail and timestamp from the output of Fluent Bit's stdout, you can use the stdout_format configuration option with the json format and remove the time_key and time_format settings. Here is an example configuration:

[SERVICE]
    ...
[INPUT]
    ...
[OUTPUT]
    Name stdout
    Match *
    Format json
    stdout_format json_lines

This configuration will output logs in JSON format without any additional information like the tail and timestamp.