Add app env for traces (#532)

Author: danimhr

auction-server/src/main.rs

@@ -73,12 +73,13 @@ async fn main() -> Result<()> {
     let tracer = opentelemetry_otlp::new_pipeline()
         .tracing()
         .with_exporter(otlp_exporter)
-        .with_trace_config(
-            trace::config().with_resource(Resource::new(vec![KeyValue::new(
-                "service.name",
-                "auction-server",
-            )])),
-        )
+        .with_trace_config(trace::config().with_resource(Resource::new(vec![
+            KeyValue::new("service.name", "auction-server"),
+            KeyValue::new(
+                "service.env",
+                std::env::var("APP_ENV").unwrap_or("mainnet".to_string()),
+            ),
+        ])))
         .install_batch(opentelemetry_sdk::runtime::Tokio)
         .map_err(|e| anyhow::anyhow!("Error initializing open telemetry: {}", e))?;
     let telemetry = tracing_opentelemetry::layer().with_tracer(tracer);