Add events calendar with ICS feed and switch content naming to English

Elternbeirat.Web/Services/PostService.cs

@@ -4,7 +4,7 @@ using Markdig;
 namespace Elternbeirat.Web.Services;
 
 /// <summary>
-/// Reads the news posts from <c>Content/beitraege/*.md</c>, renders them to HTML
+/// Reads the news posts from <c>Content/posts/*.md</c>, renders them to HTML
 /// once at startup and keeps them in memory, sorted newest first. Registered as
 /// a singleton because the content lives in the image and does not change at
 /// runtime.
@@ -15,7 +15,7 @@ public sealed class PostService
     private readonly IReadOnlyDictionary<string, Post> _postsBySlug;
 
     /// <summary>
-    /// Reads every Markdown post from the <c>Content/beitraege</c> directory
+    /// Reads every Markdown post from the <c>Content/posts</c> directory
     /// below the application root and caches it.
     /// </summary>
     public PostService(IWebHostEnvironment environment)
@@ -24,7 +24,7 @@ public sealed class PostService
             .UseYamlFrontMatter()
             .Build();
 
-        var directory = Path.Combine(environment.ContentRootPath, "Content", "beitraege");
+        var directory = Path.Combine(environment.ContentRootPath, "Content", "posts");
         var posts = new List<Post>();
 
         if (Directory.Exists(directory))
@@ -64,8 +64,8 @@ public sealed class PostService
         var source = File.ReadAllText(path);
 
         var document = Markdown.Parse(source, pipeline);
-        var title = FrontMatter.Read("titel", document, source) ?? slug;
-        var date = ParseDate(FrontMatter.Read("datum", document, source));
+        var title = FrontMatter.Read("title", document, source) ?? slug;
+        var date = ParseDate(FrontMatter.Read("date", document, source));
         var html = Markdown.ToHtml(source, pipeline);
 
         return new Post { Slug = slug, Title = title, Date = date, ContentHtml = html };