Added backend project

src/WorkTime.Api/Program.cs

@@ -0,0 +1,15 @@
+var builder = WebApplication.CreateBuilder(args);
+
+// Add services to the container.
+// Learn more about configuring OpenAPI at https://aka.ms/aspnet/openapi
+builder.Services.AddOpenApi();
+
+var app = builder.Build();
+
+// Configure the HTTP request pipeline.
+if (app.Environment.IsDevelopment()) {
+    app.MapOpenApi();
+}
+
+app.UseHttpsRedirection();
+app.Run();