[SM-153] Add scaffolded API integration test project (#2209)

test/IntegrationTestCommon/FakeRemoteIpAddressMiddleware.cs

@@ -0,0 +1,36 @@
+using System.Net;
+using Microsoft.AspNetCore.Builder;
+using Microsoft.AspNetCore.Hosting;
+using Microsoft.AspNetCore.Http;
+
+namespace Bit.IntegrationTestCommon;
+
+public class FakeRemoteIpAddressMiddleware
+{
+    private readonly RequestDelegate _next;
+    private readonly IPAddress _fakeIpAddress;
+
+    public FakeRemoteIpAddressMiddleware(RequestDelegate next, IPAddress fakeIpAddress = null)
+    {
+        _next = next;
+        _fakeIpAddress = fakeIpAddress ?? IPAddress.Parse("127.0.0.1");
+    }
+
+    public async Task Invoke(HttpContext httpContext)
+    {
+        httpContext.Connection.RemoteIpAddress ??= _fakeIpAddress;
+        await _next(httpContext);
+    }
+}
+
+public class CustomStartupFilter : IStartupFilter
+{
+    public Action<IApplicationBuilder> Configure(Action<IApplicationBuilder> next)
+    {
+        return app =>
+        {
+            app.UseMiddleware<FakeRemoteIpAddressMiddleware>();
+            next(app);
+        };
+    }
+}