feat: добавил prometheus экспортер

backend/UniVerse.Api/Program.cs

@@ -4,6 +4,7 @@ using Microsoft.AspNetCore.Authentication.JwtBearer;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.IdentityModel.Tokens;
 using Microsoft.OpenApi;
+using Prometheus;
 using Quartz;
 using Serilog;
 using UniVerse.Api.BackgroundServices;
@@ -221,6 +222,7 @@ if (app.Environment.IsDevelopment())
 app.UseCors();
 app.UseAuthentication();
 app.UseAuthorization();
+app.UseHttpMetrics();
 if (app.Environment.IsDevelopment())
 {
     app.UseAntiforgery();
@@ -228,4 +230,10 @@ if (app.Environment.IsDevelopment())
 }
 app.MapControllers();
 
+// Restrict Prometheus scrape endpoint to local and private networks.
+app.UseWhen(
+    context => context.Request.Path.StartsWithSegments("/metrics", StringComparison.OrdinalIgnoreCase),
+    branch => branch.UseMiddleware<LocalNetworksOnlyMiddleware>());
+app.MapMetrics();
+
 app.Run();