Adding check for file write or minio/s3 bucket before server start. (#7254)

cmd/platform/server.go

@@ -67,6 +67,10 @@ func runServer(configFileLocation string) {
 		*utils.Cfg.ServiceSettings.EnableDeveloper = true
 	}
 
+	if err := app.TestFileConnection(); err != nil {
+		l4g.Error("Problem with file storage settings: " + err.Error())
+	}
+
 	app.NewServer()
 	app.InitStores()
 	api.InitRouter()