support forwarding headers

src/isnd/Startup.cs

@@ -28,6 +28,7 @@ using System.Text.Json;
 using System.Text.Json.Serialization;
 using isnd.Data.Catalog;
 using Newtonsoft.Json;
+using Microsoft.AspNetCore.HttpOverrides;
 
 namespace isnd
 {
@@ -50,6 +51,12 @@ namespace isnd
             var adminStartupListConf = Configuration.GetSection("AdminList");
             var unleashConf = Configuration.GetSection("Unleash");
 
+            services.Configure<ForwardedHeadersOptions>(options =>
+            {
+                options.ForwardedHeaders =
+                    ForwardedHeaders.XForwardedFor | ForwardedHeaders.XForwardedProto;
+            });
+
             services.Configure<SmtpSettings>(smtpSettingsconf)
             .Configure<IsndSettings>(isndSettingsconf)
             .Configure<AdminStartupList>(adminStartupListConf)
@@ -140,6 +147,7 @@ namespace isnd
         ApplicationDbContext dbContext,
         IOptions<IsndSettings> isnSettingsOption)
         {
+            app.UseForwardedHeaders();
             if (env.IsDevelopment())
             {
                 app.UseDeveloperExceptionPage();