Add UseForwardedHeaders so /install.sh + backend_ws use https/wss behind Traefik

backend/Program.cs

@@ -4,6 +4,7 @@ using backend.Devices;
 using backend.Install;
 using backend.Pairing;
 using Microsoft.AspNetCore.DataProtection;
+using Microsoft.AspNetCore.HttpOverrides;
 using Microsoft.EntityFrameworkCore;
 
 var builder = WebApplication.CreateBuilder(args);
@@ -16,6 +17,13 @@ if (Directory.Exists(keysDir))
         .SetApplicationName("smart-assistant");
 }
 
+builder.Services.Configure<ForwardedHeadersOptions>(opt =>
+{
+    opt.ForwardedHeaders = ForwardedHeaders.XForwardedFor | ForwardedHeaders.XForwardedProto;
+    opt.KnownNetworks.Clear();
+    opt.KnownProxies.Clear();
+});
+
 builder.Services.AddDbContext<AppDbContext>(opt =>
     opt.UseSqlite(builder.Configuration.GetConnectionString("Default")));
 
@@ -42,6 +50,7 @@ using (var scope = app.Services.CreateScope())
     }
 }
 
+app.UseForwardedHeaders();
 app.UseAuthentication();
 app.UseAuthorization();