Implemented infrastructure layer

PhonebookService.Infrastructure/PhonebookContext.cs

@@ -0,0 +1,24 @@
+using Microsoft.EntityFrameworkCore;
+using PhonebookService.Domain.Models;
+using PhonebookService.Infrastructure.ModelConfigurations;
+
+namespace PhonebookService.Infrastructure;
+
+/// <summary>
+/// Phonebook EF database context
+/// </summary>
+public class PhonebookContext : DbContext
+{
+	public DbSet<PhonebookRecord> Records { get; set; }
+
+#pragma warning disable CS8618 // Non-nullable property must contain a non-null value when exiting constructor. Consider declaring the property as nullable.
+
+	public PhonebookContext(DbContextOptions<PhonebookContext> options) : base(options) {}
+
+#pragma warning restore CS8618 // Non-nullable property must contain a non-null value when exiting constructor. Consider declaring the property as nullable.
+
+	protected override void OnModelCreating(ModelBuilder builder)
+	{
+		builder.ApplyConfiguration(new PhonebookRecordEntityTypeConfiguration());
+	}
+}