move Prometheus endpoints to before rate limiting middleware (#121)

src/Helldivers-2-API/Program.cs

@@ -214,6 +214,9 @@
 // Make sure ASP.NET Core uses the correct addresses internally rather than Fly's proxy
 app.UseForwardedHeaders();
 
+// Maps Prometheus to /metrics
+app.MapMetrics();
+
 // Handles rate limiting so everyone plays nice
 app.UseMiddleware<RateLimitMiddleware>();
 
@@ -281,7 +284,4 @@
 You can also find additional resources on our Github: https://github.com/helldivers-2/api
 Consider supporting us at https://github.com/sponsors/dealloc");
 
-// Maps Prometheus to /metrics
-app.MapMetrics();
-
 await app.RunAsync();