add a health check command

Useful in restricted environments where commands like curl and such
are not available.

Fixes #1129

Signed-off-by: Nicola Murino <nicola.murino@gmail.com>

internal/cmd/revertprovider.go

@@ -47,7 +47,7 @@ Please take a look at the usage below to customize the options.`,
 			configDir = util.CleanDirInput(configDir)
 			err := config.LoadConfig(configDir, configFile)
 			if err != nil {
-				logger.WarnToConsole("Unable to initialize data provider, config load error: %v", err)
+				logger.WarnToConsole("Unable to load configuration: %v", err)
 				os.Exit(1)
 			}
 			kmsConfig := config.GetKMSConfig()