Program.cs

using Microsoft.AspNetCore.Builder;
using Microsoft.Extensions.FileProviders;
using Microsoft.Extensions.Hosting;

var builder = WebApplication.CreateBuilder(args);
var app = builder.Build();

//Add headers to prevent errors
app.Use(async (context, next) =>
{
    context.Response.Headers["Cross-Origin-Opener-Policy"] = "same-origin";
    context.Response.Headers["Cross-Origin-Embedder-Policy"] = "require-corp";
    await next();
});

var staticPath = Path.Combine(Directory.GetCurrentDirectory(), "public");
app.UseDefaultFiles(new DefaultFilesOptions
{
    FileProvider = new PhysicalFileProvider(staticPath),
    DefaultFileNames = new[] { "index.html" }
});
app.UseStaticFiles(new StaticFileOptions
{
    FileProvider = new PhysicalFileProvider(staticPath)
});

app.Run("http://0.0.0.0:80");