feat: add sub path for actual url

Endpoint/Common/Services/UrlHelper.cs

@@ -0,0 +1,22 @@
+using Microsoft.AspNetCore.Http;
+using System;
+using System.Linq;
+
+namespace Mirea.Api.Endpoint.Common.Services;
+
+public static class UrlHelper
+{
+    public static string CurrentDomain(HttpContext context) =>
+        context.Request.Headers["X-Forwarded-Host"].FirstOrDefault() ?? context.Request.Host.Value;
+
+    private static string CreateSubPath(string? path)
+    {
+        if (string.IsNullOrEmpty(path))
+            return "/";
+
+        return "/" + path.Trim('/') + "/";
+    }
+
+    public static string GetSubPath => CreateSubPath(Environment.GetEnvironmentVariable("ACTUAL_SUB_PATH"));
+    public static string GetSubPathSwagger => CreateSubPath(Environment.GetEnvironmentVariable("SWAGGER_SUB_PATH"));
+}