Document n8n reverse proxy settings

n8n/.env.example

@@ -2,13 +2,14 @@
 # Do not change this value after n8n has stored credentials.
 N8N_ENCRYPTION_KEY=
 
-# Initial access is through an SSH tunnel, so keep n8n on localhost.
-N8N_HOST=127.0.0.1
+# Nginx terminates HTTPS; n8n itself listens on local HTTP only.
+N8N_HOST=n8n.example.com
 N8N_PORT=5678
 N8N_LISTEN_ADDRESS=127.0.0.1
 N8N_PROTOCOL=http
-N8N_EDITOR_BASE_URL=http://127.0.0.1:5678
-N8N_SECURE_COOKIE=false
+N8N_EDITOR_BASE_URL=https://n8n.example.com
+WEBHOOK_URL=https://n8n.example.com/
+N8N_SECURE_COOKIE=true
 
 TZ=Asia/Shanghai
 GENERIC_TIMEZONE=Asia/Shanghai