Check VPS resource usage every 15 minutes

This n8n workflow template is designed to help system administrators and DevOps professionals monitor key resource usage metrics — CPU, RAM, and Disk — on a VPS (Virtual Private Server). The workflow automatically checks these resources every 15 minutes and sends an email alert if any resource usage exceeds the 80% threshold. This proactive monitoring helps maintain optimal server performance and prevents resource-related downtimes. Who This Workflow Is For • System Administrators managing Linux-based servers who need to ensure their systems are running smoothly without manual monitoring. • DevOps Professionals who manage multiple environments and need automated tools to alert them to potent

Help me set up the n8n workflow "Check VPS resource usage every 15 minutes" (https://n8n.io/workflows/2951). It uses: Send Email. Import the template JSON into my n8n instance, list every credential I need to create, and walk me through testing it.