feat(server): Add cloud deploy mode

internal/cmd/run.go

@@ -53,3 +53,17 @@ func StartService(cfg *config.Config, configPath string, localPassword string) {
 		log.Fatalf("proxy service exited with error: %v", err)
 	}
 }
+
+// WaitForCloudDeploy waits indefinitely for shutdown signals in cloud deploy mode
+// when no configuration file is available.
+func WaitForCloudDeploy() {
+	// Clarify that we are intentionally idle for configuration and not running the API server.
+	log.Info("Cloud deploy mode: No config found; standing by for configuration. API server is not started. Press Ctrl+C to exit.")
+
+	ctxSignal, cancel := signal.NotifyContext(context.Background(), syscall.SIGINT, syscall.SIGTERM)
+	defer cancel()
+
+	// Block until shutdown signal is received
+	<-ctxSignal.Done()
+	log.Info("Cloud deploy mode: Shutdown signal received; exiting")
+}

internal/config/config.go

@@ -187,9 +187,19 @@ type OpenAICompatibilityModel struct {
 //   - *Config: The loaded configuration
 //   - error: An error if the configuration could not be loaded
 func LoadConfig(configFile string) (*Config, error) {
+	return LoadConfigOptional(configFile, false)
+}
+
+// LoadConfigOptional reads YAML from configFile.
+// If optional is true and the file is missing, it returns an empty Config.
+func LoadConfigOptional(configFile string, optional bool) (*Config, error) {
 	// Read the entire configuration file into memory.
 	data, err := os.ReadFile(configFile)
 	if err != nil {
+		if optional && os.IsNotExist(err) {
+			// Missing and optional: return empty config.
+			return &Config{}, nil
+		}
 		return nil, fmt.Errorf("failed to read config file: %w", err)
 	}