feat: configure n8n to use external runners mode via environment variables

.env.example

@@ -33,6 +33,7 @@ PUBLIC_PORT=7861
 
 # Disable unnecessary services
 N8N_PYTHON_NODES_ENABLED=false
+N8N_RUNNERS_MODE=external
 N8N_LICENSE_AUTO_RENEW_ENABLED=false
 
 # -----------------------------------------------------------------------------

start.sh

@@ -35,6 +35,7 @@ export TZ="${TZ:-$GENERIC_TIMEZONE}"
 
 # Disable noisy or unnecessary services
 export N8N_PYTHON_NODES_ENABLED="${N8N_PYTHON_NODES_ENABLED:-false}"
+export N8N_RUNNERS_MODE="${N8N_RUNNERS_MODE:-external}"
 export N8N_LICENSE_AUTO_RENEW_ENABLED="${N8N_LICENSE_AUTO_RENEW_ENABLED:-false}"
 
 # n8n v2 uses built-in user management.