Correct the order of module configurations

src/OrchardCore.Modules/OrchardCore.Admin/Startup.cs

@@ -78,7 +78,8 @@ public override void Configure(IApplicationBuilder builder, IEndpointRouteBuilde
 
     public class AdminPagesStartup : StartupBase
     {
-        public override int Order => 1000;
+        public override int Order
+            => OrchardCoreConstants.ConfigureOrder.AdminPages;
 
         public override void ConfigureServices(IServiceCollection services)
         {

src/OrchardCore.Modules/OrchardCore.Cors/Startup.cs

@@ -13,9 +13,10 @@
 
 namespace OrchardCore.Cors
 {
-    public class Startup : StartupBase
+    public sealed class Startup : StartupBase
     {
-        public override int Order => -1;
+        public override int Order
+            => OrchardCoreConstants.ConfigureOrder.Cors;
 
         public override void Configure(IApplicationBuilder app, IEndpointRouteBuilder routes, IServiceProvider serviceProvider)
         {

src/OrchardCore.Modules/OrchardCore.DataProtection.Azure/Startup.cs

@@ -20,7 +20,8 @@ public Startup(IShellConfiguration configuration, ILogger<Startup> logger)
     }
 
     // Assume that this module will override default configuration, so set the Order to a value above the default.
-    public override int Order => 10;
+    public override int Order
+        => OrchardCoreConstants.ConfigureOrder.AzureDataProtection;
 
     public override void ConfigureServices(IServiceCollection services)
     {

src/OrchardCore.Modules/OrchardCore.HomeRoute/Startup.cs

@@ -10,7 +10,8 @@ namespace OrchardCore.HomeRoute
 {
     public class Startup : StartupBase
     {
-        public override int Order => -150;
+        public override int Order
+            => OrchardCoreConstants.ConfigureOrder.HomeRoute;
 
         public override void ConfigureServices(IServiceCollection services)
         {

src/OrchardCore.Modules/OrchardCore.Media.AmazonS3/Startup.cs

@@ -150,9 +150,8 @@ public ImageSharpAmazonS3CacheStartup(
         _logger = logger;
     }
 
-    // The order should exceed that of the 'OrchardCore.Media' module to substitute the default implementation of 'IImageCache'.
-    // there.
-    public override int Order => Media.MediaConstants.StartupOrder + 5;
+    public override int Order
+        => OrchardCoreConstants.ConfigureOrder.ImageSharpCache;
 
     public override void ConfigureServices(IServiceCollection services)
     {

src/OrchardCore.Modules/OrchardCore.Media.Azure/Startup.cs

@@ -36,7 +36,8 @@ public Startup(ILogger<Startup> logger, IShellConfiguration configuration)
             _configuration = configuration;
         }
 
-        public override int Order => MediaConstants.StartupOrder + 10;
+        public override int Order
+            => OrchardCoreConstants.ConfigureOrder.AzureMediaStorage;
 
         public override void ConfigureServices(IServiceCollection services)
         {
@@ -156,9 +157,8 @@ public ImageSharpAzureBlobCacheStartup(
             _logger = logger;
         }
 
-        // The order should exceed that of the 'OrchardCore.Media' module to substitute the default implementation of 'IImageCache'.
-        // there.
-        public override int Order => MediaConstants.StartupOrder + 5;
+        public override int Order
+            => OrchardCoreConstants.ConfigureOrder.AzureImageSharpCache;
 
         public override void ConfigureServices(IServiceCollection services)
         {

src/OrchardCore.Modules/OrchardCore.Media/Startup.cs

@@ -55,7 +55,8 @@ namespace OrchardCore.Media
 {
     public class Startup : StartupBase
     {
-        public override int Order => MediaConstants.StartupOrder;
+        public override int Order
+            => OrchardCoreConstants.ConfigureOrder.Media;
 
         private const string ImageSharpCacheFolder = "is-cache";
 

src/OrchardCore.Modules/OrchardCore.ReverseProxy/Startup.cs

@@ -16,10 +16,10 @@
 
 namespace OrchardCore.ReverseProxy
 {
-    public class Startup : StartupBase
+    public sealed class Startup : StartupBase
     {
-        // we need this to start before other security related initialization logic
-        public override int Order => -1;
+        public override int Order
+            => OrchardCoreConstants.ConfigureOrder.ReverseProxy;
 
         public override void Configure(IApplicationBuilder app, IEndpointRouteBuilder routes, IServiceProvider serviceProvider)
         {
@@ -40,7 +40,7 @@ public override void ConfigureServices(IServiceCollection services)
     }
 
     [RequireFeatures("OrchardCore.Deployment")]
-    public class DeploymentStartup : StartupBase
+    public sealed class DeploymentStartup : StartupBase
     {
         public override void ConfigureServices(IServiceCollection services)
         {

src/OrchardCore/OrchardCore.Abstractions/Modules/StartupBase.cs

@@ -9,7 +9,7 @@ namespace OrchardCore.Modules
     public abstract class StartupBase : IStartup, IAsyncStartup
     {
         /// <inheritdoc />
-        public virtual int Order { get; }
+        public virtual int Order { get; } = OrchardCoreConstants.ConfigureOrder.Default;
 
         /// <inheritdoc />
         public virtual int ConfigureOrder => Order;

src/OrchardCore/OrchardCore.Abstractions/OrchardCoreConstants.cs

@@ -28,4 +28,44 @@ public class Roles
 
         public const string Anonymous = "Anonymous";
     }
+
+    public class ConfigureOrder
+    {
+        public const int Default = 0;
+
+        // The configuration for authentication should be set up early, prior to any non-security modules.
+        public const int Authentication = -150;
+
+        // The reverse proxy should always be configured before the 'Authentication' and security initialization logic.
+        public const int ReverseProxy = Authentication * 2;
+
+        public const int Cors = ReverseProxy;
+
+        public const int Media = Default;
+
+        // Image cache overrides Media configurations and services.
+        // The order number should always be greater than Media module. 
+        public const int ImageSharpCache = Media + 5;
+
+        // Image cache overrides Media configurations and services.
+        // The order number should always be greater than Media module. 
+        public const int AzureImageSharpCache = Media + 5;
+
+        // Azure media storage overrides Media configurations and services.
+        // The order number should always be greater than Media module.
+        public const int AzureMediaStorage = Media + 10;
+
+        public const int DataProtection = Default;
+
+        // Azure DataProtection will override default data-protection configurations.
+        // The order number should always be greater than data protection modules. 
+        public const int AzureDataProtection = DataProtection + 10;
+
+        public const int HomeRoute = -150;
+
+        public const int AdminPages = 1000;
+
+        // Services that should always be registered before everything else.
+        public const int InfrastructureService = int.MinValue + 100;
+    }
 }

src/OrchardCore/OrchardCore/Modules/Extensions/ServiceCollectionExtensions.cs

@@ -308,7 +308,7 @@ sd is ClonedSingletonDescriptor &&
 
                 collection.AddMetrics();
             },
-            order: int.MinValue + 100);
+            order: OrchardCoreConstants.ConfigureOrder.InfrastructureService);
         }
 
         /// <summary>
@@ -339,7 +339,7 @@ private static void AddRouting(OrchardCoreBuilder builder)
 
                 collection.AddRouting();
             },
-            order: int.MinValue + 100);
+            order: OrchardCoreConstants.ConfigureOrder.InfrastructureService);
         }
 
         /// <summary>
@@ -378,7 +378,7 @@ sd is ClonedSingletonDescriptor &&
                 collection.AddSingleton<IHttpClientFactory>(sp => sp.GetRequiredService<TenantHttpClientFactory>());
                 collection.AddSingleton<IHttpMessageHandlerFactory>(sp => sp.GetRequiredService<TenantHttpClientFactory>());
             },
-            order: int.MinValue + 100);
+            order: OrchardCoreConstants.ConfigureOrder.InfrastructureService);
         }
 
         /// <summary>
@@ -407,7 +407,7 @@ sd is ClonedSingletonDescriptor &&
                 // Configure ApiExplorer at the tenant level.
                 collection.AddEndpointsApiExplorer();
             },
-            order: int.MinValue + 100);
+            order: OrchardCoreConstants.ConfigureOrder.InfrastructureService);
         }
 
         /// <summary>
@@ -429,7 +429,7 @@ private static void AddAntiForgery(OrchardCoreBuilder builder)
                         options.Cookie.Name = cookieName;
 
                         // Don't set the cookie builder 'Path' so that it uses the 'IAuthenticationFeature' value
-                        // set by the pipeline and comming from the request 'PathBase' which already ends with the
+                        // set by the pipeline and coming from the request 'PathBase' which already ends with the
                         // tenant prefix but may also start by a path related e.g to a virtual folder.
                     });
 
@@ -522,7 +522,7 @@ private static void AddAuthentication(OrchardCoreBuilder builder)
             .Configure(app =>
             {
                 app.UseAuthentication();
-            }, order: -150);
+            }, order: OrchardCoreConstants.ConfigureOrder.Authentication);
         }
 
         /// <summary>
@@ -557,7 +557,7 @@ private static void AddDataProtection(OrchardCoreBuilder builder)
                 services.RemoveAll<IConfigureOptions<DataProtectionOptions>>();
 
                 services.Add(collection);
-            });
+            }, order: OrchardCoreConstants.ConfigureOrder.DataProtection);
         }
     }
 }

src/docs/reference/modules/Media/README.md

@@ -118,7 +118,7 @@ The quality used when compressing the image.
 
 #### `format` (or fifth argument)
 
-The image format to use when processing the ouput of an image.
+The image format to use when processing the output of an image.
 
 Supported formats include `bmp`, `gif`, `jpg`, `png`, `tga`.
 
@@ -151,13 +151,13 @@ The anchor of the new image.
 
 The background color of the new image when `mode` is `pad` or `boxpad`. Examples of valid values: `white`, `ffff00`, `ffff0080`, `128,64,32` and `128,64,32,16`.
 
-#### bgcolor Input
+#### `bgcolor` Input
 
 ```
 {{ 'animals/kittens.jpg' | asset_url | resize_url: width:100, height:240, mode:'pad', bgcolor:'white' }}
 ```
 
-#### bgcolor Output
+#### `bgcolor` Output
 
 `<img src="~/media/animals/kittens.jpg?width=100&height=240&rmode=pad&bgcolor=white" />`