Add docs

Signed-off-by: Michael Pilat <[email protected]>

Author: mikepilat

docs/install/cmd/run.md

@@ -195,6 +195,12 @@ Set the log level to *level*, where *level* can be one of `trace`, `debug`,
 
 Can also be set using the *IMAGE_UPDATER_LOGLEVEL* environment variable.
 
+**--log-format *format***
+
+Set the log format to *format*, where *level* can be one of `text` or `json`
+
+Can also be set using the *IMAGE_UPDATER_LOG_FORMAT* environment variable.
+
 **--match-application-label *selector***
 
 Only process applications that have a valid annotation and match the given