Create a RED method dashboard as code using the Grafana Terraform provider

Steps

1. Add the Grafana Terraform provider to your providers block: source = grafana/grafana, and configure it with the url and auth (YOUR_TOKEN) attributes
2. Define a grafana_folder resource for your service dashboards to keep them organized
3. Write a grafana_dashboard resource with a json_encoded_dashboard argument pointing to a local JSON file or using the jsonencode() function inline; include three panels: Rate (requests/sec using rate()), Errors (error ratio), and Duration (histogram_quantile over your latency histogram)
4. Parameterize the dashboard with template variables for service name and environment using the templating.list array in the dashboard JSON so the same dashboard works across services
5. Run terraform plan to preview the dashboard diff and terraform apply to create it; use the grafana_dashboard.dashboard_url output to link to the created dashboard
6. Store the Terraform state in a remote backend (S3 or Terraform Cloud) and add a CI job that runs terraform fmt and terraform validate on every pull request