Add build info output at application start

cmd/idp/main.go

@@ -49,6 +49,12 @@ const (
 	DefaultServerPort = 3000
 )
 
+var (
+	version = "local"
+	commit  = "unknown"
+	date    = "unknown"
+)
+
 func main() {
 	logger := log.New()
 
@@ -68,6 +74,9 @@ func main() {
 		log.Fatalf("error loading configuration: %v", err)
 	}
 
+	logger.WithFields(log.Fields{
+		"version": version, "commit": commit, "date": date,
+	}).Info("Starting CAcert OpenID Connect Identity Provider")
 	logger.Infoln("Server is starting")
 	bundle, catalog := services.InitI18n(logger, config.Strings("i18n.languages"))