doc: default log level is warn

Author: Phil Varner

README.md

@@ -403,7 +403,7 @@ There are some settings that should be reviewed and updated as needeed in the se
 | STAC_DESCRIPTION                 | Description of this catalog                                                                                                                                                                      | A STAC API                                                                           |
 | STAC_DOCS_URL                    | URL to documentation                                                                                                                                                                             | [https://stac-utils.github.io/stac-server](https://stac-utils.github.io/stac-server) |
 | INGEST_BATCH_SIZE                | Number of records to ingest in single batch                                                                                                                                                      | 500                                                                                  |
-| LOG_LEVEL                        | Level for logging (error, warn, info, http, verbose, debug, silly)                                                                                                                               | INFO                                                                                 |
+| LOG_LEVEL                        | Level for logging (error, warn, info, http, verbose, debug, silly)                                                                                                                               | warn                                                                                 |
 | REQUEST_LOGGING_ENABLED                        | Express request logging enabled. String 'false' disables.                                                                                                                               | enabled                                                                                 |
 | REQUEST_LOGGING_FORMAT                        | Express request logging format to use. Any of the [Morgan predefined formats](https://github.com/expressjs/morgan#predefined-formats).                                                                                                                           | tiny                                                                                 |
 | STAC_API_URL                     | The root endpoint of this API                                                                                                                                                                    | Inferred from request                                                                |