Updated the Installation of Oqtane to use Migrations

Oqtane.Server/Repository/Interfaces/IDbConfig.cs

@@ -0,0 +1,14 @@
+using Microsoft.AspNetCore.Http;
+using Microsoft.Extensions.Configuration;
+
+namespace Oqtane.Repository
+{
+    public interface IDbConfig
+    {
+        public IHttpContextAccessor Accessor { get; }
+
+        public IConfiguration Configuration { get; }
+
+        public string ConnectionString { get; set; }
+    }
+}