Program.cs

using MyWeatherHub;
using MyWeatherHub.Components;
using Microsoft.Extensions.Diagnostics.HealthChecks;
using Npgsql.EntityFrameworkCore.PostgreSQL;

var builder = WebApplication.CreateBuilder(args);

builder.AddServiceDefaults();
builder.Services.AddHttpClient<NwsManager>(client =>
{
    client.BaseAddress = new("https+http://api");
});

// Add services to the container.
builder.Services.AddRazorComponents()
    .AddInteractiveServerComponents();

builder.Services.AddMemoryCache();

builder.AddNpgsqlDbContext<MyWeatherContext>(connectionName: "weatherdb");

// Add health check services for database
builder.Services.AddHealthChecks()
    .AddNpgSql(
        builder.Configuration.GetConnectionString("weatherdb"),
        name: "database"
    );

var app = builder.Build();

app.MapDefaultEndpoints();

// Configure the HTTP request pipeline.
if (!app.Environment.IsDevelopment())
{
    app.UseExceptionHandler("/Error", createScopeForErrors: true);
    // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
    app.UseHsts();
}
else
{
    using (var scope = app.Services.CreateScope())
    {
        var context = scope.ServiceProvider.GetRequiredService<MyWeatherContext>();
        await context.Database.EnsureCreatedAsync();
    }
}

app.UseHttpsRedirection();

app.UseStaticFiles();
app.UseAntiforgery();

app.MapRazorComponents<App>()
    .AddInteractiveServerRenderMode();

app.Run();