Rework page errors (again)

Backend/Startup.cs

@@ -32,7 +32,7 @@ if (!app.Environment.IsDevelopment()) {
 var provider = new FileExtensionContentTypeProvider { Mappings = { [".gpg"] = "application/pgp-signature" } };
 app.UseStaticFiles(new StaticFileOptions { ContentTypeProvider = provider });
 
-app.UseStatusCodePagesWithReExecute("/ErrorPages/{0}");
+app.UseStatusCodePagesWithReExecute("/error");
 
 app.UseSession();
 app.UseRouting();

Pages/Error.cshtml

@@ -1,11 +1,24 @@
 @page
+@using Microsoft.AspNetCore.WebUtilities
 @model ErrorModel
 @{
-	ViewData["Title"] = "error";
+	ViewData["Title"] = $"error_{Response.StatusCode}";
 }
 
-<h1 class="text-danger">Error.</h1>
-<h2 class="text-danger">An error occurred while processing your request.</h2>
+@if (Response.StatusCode == 200) {
+	<h1>No error occured.</h1>
+	<p>Why are you here?</p>
+}
+
+else {
+	<h1>Error @Response.StatusCode: @ReasonPhrases.GetReasonPhrase(Response.StatusCode)</h1>
+	if (Response.StatusCode == 404) {
+		<p>The page you requested does not exist on this server.</p>
+	}
+	else {
+		<p>An error occurred while processing your request.</p>
+	}
+}
 
 @if (Model.ShowRequestId) {
 	<p>

Pages/ErrorPages/404.cshtml

@@ -1,7 +0,0 @@
-@page
-@{
-	ViewData["Title"] = "error_404";
-}
-
-<h1 class="text-danger">Not found.</h1>
-<p>The page you requested does not exist on this server.</p>

zotan.pw-web.csproj

@@ -26,6 +26,10 @@
         <None Remove="database.db"/>
     </ItemGroup>
 
+    <ItemGroup>
+        <_ContentIncludedByDefault Remove="Pages\ErrorPages\404.cshtml"/>
+    </ItemGroup>
+
     <Target Name="SetSourceRevisionId" BeforeTargets="InitializeSourceControlInformation">
         <Exec Command="git describe --long --always --dirty --exclude=* --abbrev=8" ConsoleToMSBuild="True" IgnoreExitCode="False">
             <Output PropertyName="SourceRevisionId" TaskParameter="ConsoleOutput"/>