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docs: document journald image name field 

The `IMAGE_NAME` field is exported to the `journald` logging driver, but wasn't documented previously.

Since this field is likely to be relevant to consumers, this adds documentation for it.
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Moritz Sanft 2024-08-07 14:52:08 +02:00 committed by David Karlsson
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content/engine/logging/drivers/journald.md
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@ -23,6 +23,7 @@ stores the following metadata in the journal with each message:
| `CONTAINER_NAME` | The container name at the time it was started. If you use `docker rename` to rename a container, the new name isn't reflected in the journal entries. |
| `CONTAINER_TAG`, `SYSLOG_IDENTIFIER` | The container tag ([log tag option documentation](log_tags.md)). |
| `CONTAINER_PARTIAL_MESSAGE` | A field that flags log integrity. Improve logging of long log lines. |
| `IMAGE_NAME` | The name of the container image. |
## Usage