fix: bind env vars explicitly for viper to work without config file

AutomaticEnv() requires keys to be registered. Without a config file,
viper has no keys and ignores environment variables.

Author: ysyneu

Dockerfile

@@ -27,11 +27,11 @@ WORKDIR /app
 COPY --from=build /bin/flashduty-runner .
 
 # Set environment variables
-ENV FLASHDUTY_API_KEY=""
-ENV FLASHDUTY_API_URL="wss://api.flashcat.cloud/runner/ws"
+ENV FLASHDUTY_RUNNER_API_KEY=""
+ENV FLASHDUTY_RUNNER_API_URL="wss://api.flashcat.cloud/runner/ws"
 ENV FLASHDUTY_RUNNER_NAME=""
-ENV FLASHDUTY_WORKSPACE_ROOT="/workspace"
-ENV FLASHDUTY_AUTO_UPDATE="false"
+ENV FLASHDUTY_RUNNER_WORKSPACE_ROOT="/workspace"
+ENV FLASHDUTY_RUNNER_AUTO_UPDATE="false"
 
 # Create workspace directory
 VOLUME ["/workspace"]

config/config.go

@@ -106,6 +106,15 @@ func Load(configPath string) (*Config, error) {
 	v.SetEnvKeyReplacer(strings.NewReplacer(".", "_"))
 	v.AutomaticEnv()
 
+	// Explicitly bind environment variables (required for AutomaticEnv to work without config file)
+	_ = v.BindEnv("api_key")
+	_ = v.BindEnv("api_url")
+	_ = v.BindEnv("name")
+	_ = v.BindEnv("workspace_root")
+	_ = v.BindEnv("auto_update")
+	_ = v.BindEnv("log.level")
+	_ = v.BindEnv("log.format")
+
 	// Unmarshal into config struct
 	if err := v.Unmarshal(cfg); err != nil {
 		return nil, fmt.Errorf("failed to unmarshal config: %w", err)