feat: enhance n8n workflows with dynamic credential management and email configuration

docker-compose.yml

@@ -389,6 +389,7 @@ services:
       N8N_PROTOCOL: http
       WEBHOOK_URL: http://localhost:55590/
       N8N_ENCRYPTION_KEY: ${N8N_ENCRYPTION_KEY}
+      N8N_ENFORCE_SETTINGS_FILE_PERMISSIONS: "false"
 
       # Database (n8n stores its own data in the same Postgres)
       DB_TYPE: postgresdb
@@ -409,8 +410,29 @@ services:
 
       # Allow importing workflows from filesystem
       N8N_USER_FOLDER: /home/node/.n8n
+
+      # Workflow/credential bootstrap (re-import on every start)
+      N8N_POSTGRES_CREDENTIAL_ID: ${N8N_POSTGRES_CREDENTIAL_ID}
+      N8N_POSTGRES_CREDENTIAL_NAME: ${N8N_POSTGRES_CREDENTIAL_NAME}
+      N8N_SMTP_CREDENTIAL_ID: ${N8N_SMTP_CREDENTIAL_ID}
+      N8N_SMTP_CREDENTIAL_NAME: ${N8N_SMTP_CREDENTIAL_NAME}
+      N8N_SMTP_HOST: ${N8N_SMTP_HOST}
+      N8N_SMTP_USER: ${N8N_SMTP_USER}
+      N8N_SMTP_PASS: ${N8N_SMTP_PASS}
+      N8N_PAYPAL_KAUTION_LINK: ${N8N_PAYPAL_KAUTION_LINK}
+      N8N_PAYPAL_MIETE_LINK: ${N8N_PAYPAL_MIETE_LINK}
+      N8N_PAYMENT_WORKFLOW_ID: ${N8N_PAYMENT_WORKFLOW_ID}
+      N8N_WORKFLOW_TEMPLATE: /opt/mc-cars/workflows/01-qualification-payment-email.json
     volumes:
       - /mnt/user/appdata/mc-cars/data/n8n:/home/node/.n8n
+      - /mnt/user/appdata/mc-cars/n8n/workflows:/opt/mc-cars/workflows:ro
+      - /mnt/user/appdata/mc-cars/n8n/bootstrap:/opt/mc-cars/bootstrap:ro
+    entrypoint: ["/bin/sh", "-c"]
+    command:
+      - |
+        set -e
+        /bin/sh /opt/mc-cars/bootstrap/bootstrap-n8n.sh
+        exec n8n start
     ports:
       - "55590:5678"
     networks: [mccars]