feat: Add development settings for local server port in .env.example

Author: karlspace

.env.example

@@ -22,6 +22,10 @@ DATABASE_PASSWORD=CHANGE_ME_SECURE_PASSWORD
 # Unique subnet ID (1-254) to avoid conflicts with other stacks
 PRIVATESUBNET=252
 
+# -- Development Settings --
+# Server port for local development (default: 8000)
+DEV_SERVER_PORT=8000
+
 # -- Traefik Proxy Settings --
 # DNS must resolve to ${SERVICE_HOSTNAME}
 SERVICE_HOSTNAME=error-observability.app.example.com