feat(server): Add cloud deploy mode

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)
 	}