Fix login/signup in Docker deployments behind reverse proxy

docker-compose.yml

@@ -9,6 +9,9 @@ services:
       ASPNETCORE_ENVIRONMENT: Development
       Database__DefaultConnection: "Host=postgres;Port=5432;Database=simplemodule;Username=simplemodule;Password=${POSTGRES_PASSWORD:-simplemodule}"
       Database__Provider: PostgreSQL
+      # Set to your public URL so OpenIddict registers correct redirect URIs.
+      # Examples: https://app.simplemodule.dev, http://localhost:8080
+      OpenIddict__BaseUrl: ${APP_BASE_URL:-http://localhost:8080}
     depends_on:
       postgres:
         condition: service_healthy

framework/SimpleModule.Hosting/SimpleModuleHostExtensions.cs

@@ -1,6 +1,7 @@
 using Microsoft.AspNetCore.Builder;
 using Microsoft.AspNetCore.Diagnostics.HealthChecks;
 using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.HttpOverrides;
 using Microsoft.AspNetCore.StaticFiles;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.EntityFrameworkCore.Diagnostics;
@@ -48,6 +49,15 @@ public static WebApplicationBuilder AddSimpleModuleInfrastructure(
         BridgeAspireConnectionString(builder.Configuration);
         options.DatabaseProvider = ValidateDatabaseConfiguration(builder.Configuration);
 
+        builder.Services.Configure<ForwardedHeadersOptions>(fhOptions =>
+        {
+            fhOptions.ForwardedHeaders =
+                ForwardedHeaders.XForwardedFor | ForwardedHeaders.XForwardedProto;
+            // Allow any proxy in containerized/cloud environments
+            fhOptions.KnownIPNetworks.Clear();
+            fhOptions.KnownProxies.Clear();
+        });
+
         builder.Services.AddProblemDetails();
         builder.Services.AddExceptionHandler<GlobalExceptionHandler>();
 
@@ -129,6 +139,7 @@ public static async Task UseSimpleModuleInfrastructure(this WebApplication app)
             }
         }
 
+        app.UseForwardedHeaders();
         app.UseExceptionHandler();
 
         var options = app.Services.GetRequiredService<SimpleModuleOptions>();

modules/OpenIddict/src/SimpleModule.OpenIddict/Services/OpenIddictSeedService.cs

@@ -38,16 +38,6 @@ CancellationToken cancellationToken
     {
         var manager = scope.ServiceProvider.GetRequiredService<IOpenIddictApplicationManager>();
 
-        if (
-            await manager.FindByClientIdAsync(ClientConstants.ClientId, cancellationToken)
-            is not null
-        )
-        {
-            return;
-        }
-
-        LogSeedingClient(logger);
-
         var baseUrl = configuration[ConfigKeys.OpenIddictBaseUrl] ?? ClientConstants.DefaultBaseUrl;
 
         var descriptor = new OpenIddictApplicationDescriptor
@@ -97,6 +87,18 @@ is not null
             }
         }
 
+        var existing = await manager.FindByClientIdAsync(
+            ClientConstants.ClientId,
+            cancellationToken
+        );
+        if (existing is not null)
+        {
+            LogUpdatingClient(logger);
+            await manager.UpdateAsync(existing, descriptor, cancellationToken);
+            return;
+        }
+
+        LogSeedingClient(logger);
         await manager.CreateAsync(descriptor, cancellationToken);
     }
 
@@ -106,6 +108,12 @@ is not null
     )]
     private static partial void LogSeedingClient(ILogger logger);
 
+    [LoggerMessage(
+        Level = LogLevel.Information,
+        Message = "Updating OpenIddict client application..."
+    )]
+    private static partial void LogUpdatingClient(ILogger logger);
+
     [LoggerMessage(
         Level = LogLevel.Warning,
         Message = "OpenIddict seeding skipped due to error: {ErrorMessage}"

template/SimpleModule.Host/appsettings.Production.json

@@ -3,6 +3,9 @@
     "DefaultConnection": "Data Source=/app/data/app.db",
     "Provider": "Sqlite"
   },
+  "OpenIddict": {
+    "BaseUrl": "https://app.simplemodule.dev"
+  },
   "Storage": {
     "Local": {
       "BasePath": "/app/storage"