Add deployment improvements and UI enhancements

- Clone specific commit SHA from webhook instead of just branch HEAD
- Log webhook payload in deployment logs
- Add build/deploy timing to ntfy and Slack notifications
- Implement container rollback on deploy failure
- Remove old container only after successful deployment
- Show relative times in deployment history (hover for full date)
- Update port mappings UI with labeled text inputs
- Add footer with version info, license, and repo link
- Format deploy key comment as upaas_DATE_appname

internal/config/config.go

@@ -45,6 +45,7 @@ type Config struct {
 	Port            int
 	Debug           bool
 	DataDir         string
+	HostDataDir     string // Host path for DataDir (for Docker bind mounts when running in container)
 	DockerHost      string
 	SentryDSN       string
 	MaintenanceMode bool
@@ -116,11 +117,19 @@ func buildConfig(log *slog.Logger, params *Params) (*Config, error) {
 		// Config file not found is OK
 	}
 
+	dataDir := viper.GetString("DATA_DIR")
+	hostDataDir := viper.GetString("HOST_DATA_DIR")
+
+	if hostDataDir == "" {
+		hostDataDir = dataDir
+	}
+
 	// Build config struct
 	cfg := &Config{
 		Port:            viper.GetInt("PORT"),
 		Debug:           viper.GetBool("DEBUG"),
-		DataDir:         viper.GetString("DATA_DIR"),
+		DataDir:         dataDir,
+		HostDataDir:     hostDataDir,
 		DockerHost:      viper.GetString("DOCKER_HOST"),
 		SentryDSN:       viper.GetString("SENTRY_DSN"),
 		MaintenanceMode: viper.GetBool("MAINTENANCE_MODE"),