Add initial database context and first entity

Data/DiaryDBContext.cs

@@ -0,0 +1,27 @@
+using Diary.Component.Entry.Repository;
+using Microsoft.EntityFrameworkCore;
+
+namespace Diary.Data
+{
+
+	public interface IDiaryDBContext
+	{ 
+		DbSet<Entry> Entries { get; set; }
+	}
+
+	public class DiaryDBContext : DbContext, IDiaryDBContext
+	{
+		public DbSet<Entry> Entries { get; set; }
+
+		public DiaryDBContext(DbContextOptions<DiaryDBContext> options) : base(options)
+		{
+		}
+
+		protected override void OnModelCreating(ModelBuilder builder)
+		{
+			base.OnModelCreating(builder);
+
+			builder.ApplyConfiguration(new EntryConfiguration());
+		}
+	}
+}