Constant DATASOURCES_YML 

pub const DATASOURCES_YML: &str = r#"
apiVersion: 1
datasources:
  - name: Prometheus
    type: prometheus
    url: http://localhost:9090
    access: proxy
    isDefault: true
  - name: Loki
    type: loki
    url: http://localhost:3100
    access: proxy
    isDefault: false
  - name: Tempo
    type: tempo
    url: http://localhost:3200
    access: proxy
    isDefault: false
  - name: Pyroscope
    type: grafana-pyroscope-datasource
    url: http://localhost:4040
    access: proxy
    isDefault: false
"#;

YAML configuration for Grafana datasources (Prometheus, Loki, Tempo, and Pyroscope)