Re-add Prometheus options (#312)

Co-authored-by: Boris Ahrens <boris.ahrens@gdata.de>

src/MalwareSampleExchange.Console/Dockerfile

@@ -5,7 +5,7 @@ WORKDIR /data
 RUN apk add curl
 ENTRYPOINT dotnet /data/MalwareSampleExchange.Console.dll
 
-ENV ASPNETCORE_URLS="http://0.0.0.0:8080"
+ENV ASPNETCORE_URLS="http://0.0.0.0:8080;http://0.0.0.0:9110"
 
 LABEL org.opencontainers.image.title="Malware Sample Exchange (MSE) Image" \
       org.opencontainers.image.description="Malware Sample Exchange (MSE)" \

src/MalwareSampleExchange.Console/PrometheusOptions.cs

@@ -0,0 +1,6 @@
+namespace MalwareSampleExchange.Console;
+
+public class PrometheusOptions
+{
+    public int Port { get; set; } = 9110;
+}

src/MalwareSampleExchange.Console/Startup.cs

@@ -130,7 +130,12 @@ public void ConfigureServices(IServiceCollection services)
 
     public void Configure(IApplicationBuilder app)
     {
-        app.UsePrometheusServer(options => options.Port = 8080);
+        app.UsePrometheusServer(q =>
+        {
+            var options = new PrometheusOptions();
+            _configuration.GetSection("Prometheus").Bind(options);
+            q.Port = options.Port;
+        });
 
         app.UsePrometheusRequestDurations(q =>
         {