README.md: refine performanceStorage configuration documentation

Signed-off-by: Jérôme Benoit <jerome.benoit@sap.com>

diff --git a/README.md b/README.md
index 71112238884c96bb04896c2cbf86f13cdbffbf27..1a12c045f69b9a766005b163917e961381bfd39a 100644 (file)
--- a/README.md
+++ b/README.md
@@ -36,7 +36,7 @@ logMaxFiles | | 7 | integer | maximum number of log files to keep
 logLevel | emerg/alert/crit/error/warning/notice/info/debug | info | string | winston logging level
 logFile | | combined.log | string | log file relative path
 logErrorFile | | error.log | string | error log file relative path 
-performanceStorage | | { "enabled": false, "type": "jsonfile", "file:///performanceMeasurements.json" } | { enabled: string; type: string; URI: string; } | performance storage configuration section
+performanceStorage | | { "enabled": false, "type": "jsonfile", "file:///performanceMeasurements.json" } | { enabled: string; type: string; URI: string; } where type can be 'jsonfile' or 'mongodb' | performance storage configuration section
 stationTemplateURLs | | {}[] | { file: string; numberOfStations: number; }[] | array of charging station templates URIs configuration section (template file name and number of stations)
  
 ### Charging station template