How can we make fluentbit flush output on startup?

[Lekshmi-Ra]

Hi, we would like to set the output flush interval longer (upto a day) due to system requirements. This makes the first flush operation to be triggered after a day, which is not very desirable as we are interested in getting the data as soon as the system reboots. Without waiting for the entire flush interval, is there a way to make fluentbit flush on startup?