API mostly working, starting to work on webapp

Entities/Cover.cs

@@ -0,0 +1,12 @@
+using Microsoft.EntityFrameworkCore;
+
+namespace ComiServ.Entities
+{
+    [PrimaryKey("FileXxhash64")]
+    public class Cover
+    {
+        public long FileXxhash64 { get; set; }
+        public string Filename { get; set; } = null!;
+        public byte[] CoverFile { get; set; } = null!;
+    }
+}