Export Prometheus metrics on regular listeners

crates/config/src/sections/http.rs

@@ -251,6 +251,9 @@ pub enum Resource {
     /// Healthcheck endpoint (/health)
     Health,
 
+    /// Prometheus metrics endpoint (/metrics)
+    Prometheus,
+
     /// OIDC discovery endpoints
     Discovery,
 

crates/config/src/sections/telemetry.rs

@@ -237,11 +237,9 @@ pub enum MetricsExporterConfig {
         endpoint: Option<Url>,
     },
 
-    /// Export metrics by exposing a Prometheus-compatible endpoint
-    Prometheus {
-        /// IP and port on which the Prometheus endpoint should be exposed
-        address: String,
-    },
+    /// Export metrics via Prometheus. An HTTP listener with the `prometheus`
+    /// resource must be setup to expose the Promethes metrics.
+    Prometheus,
 }
 
 impl Default for MetricsExporterConfig {