public async Task <IActionResult> Description(
int cid, JuryMarkdownModel model,
[FromServices] IProblemFileRepository io,
[FromServices] IMarkdownService md)
{
model.Markdown ??= "";
await io.WriteStringAsync($"c{cid}/readme.md", model.Markdown);
var document = md.Parse(model.Markdown);
await io.WriteStringAsync($"c{cid}/readme.html", md.RenderAsHtml(document));
await HttpContext.AuditAsync("updated", $"{cid}", "description");
return(View(model));
}