Check for Last.FM and Spotify configuration at startup

server/initial_setup.go

@@ -93,3 +93,13 @@ func checkFfmpegInstallation() {
 		conf.Server.Scanner.Extractor = "taglib"
 	}
 }
+
+func checkExternalCredentials() {
+	if conf.Server.LastFM.ApiKey == "" || conf.Server.LastFM.Secret == "" {
+		log.Info("Last.FM integration not available: missing ApiKey/Secret")
+	}
+
+	if conf.Server.Spotify.ID == "" || conf.Server.Spotify.Secret == "" {
+		log.Info("Spotify integration is not enabled: artist images will not be available")
+	}
+}

server/server.go

@@ -33,6 +33,7 @@ func New(scanner *scanner.Scanner, ds model.DataStore) *Server {
 	a.initRoutes()
 	a.initScanner()
 	checkFfmpegInstallation()
+	checkExternalCredentials()
 	return a
 }