Add support for JSON logging

cmd/app/main.go

@@ -72,6 +72,10 @@ func main() {
 		logger.SetLevel(logLevel)
 	}
 
+	if config.Bool("log.json") {
+		logger.SetFormatter(&log.JSONFormatter{})
+	}
+
 	bundle, catalog := services.InitI18n(logger, config.Strings("i18n.languages"))
 
 	services.AddMessages(catalog)

internal/services/configuration.go

@@ -43,6 +43,8 @@ var DefaultConfiguration = map[string]interface{}{
 	"oidc.server":         "https://auth.cacert.localhost:4444/",
 	"session.path":        "sessions/app",
 	"i18n.languages":      []string{"en", "de"},
+	"log.level":           "info",
+	"log.json":            true,
 }
 
 func ConfigureApplication(