agologum/api/Program.cs

using Microsoft.AspNetCore.HttpOverrides;
using Microsoft.EntityFrameworkCore;

using agologumApi.Services;

var builder = WebApplication.CreateBuilder(args);

builder.Services.AddDbContext<AppDbContext>(options => 
    options.UseNpgsql(builder.Configuration.GetConnectionString("DefaultConnection")));

builder.Services.AddControllers();
builder.Services.AddScoped<UserService>();

// configuration for behind my nginx proxy
builder.Services.Configure<ForwardedHeadersOptions>(options =>
{
    options.ForwardedHeaders =
        ForwardedHeaders.XForwardedFor |
        ForwardedHeaders.XForwardedProto;

    options.KnownIPNetworks.Clear();
    options.KnownProxies.Clear();
});

// Add services to the container.
// Learn more about configuring OpenAPI at https://aka.ms/aspnet/openapi
builder.Services.AddOpenApi();

builder.Services.AddCors(options =>
{
    options.AddPolicy("dev",
        policy =>
        {
            policy.AllowAnyOrigin()
                  .AllowAnyHeader()
                  .AllowAnyMethod();
        });
});

builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();

var app = builder.Build();

app.UseForwardedHeaders();
app.UseCors("dev");

// Configure the HTTP request pipeline.
if (app.Environment.IsEnvironment("Development")) {
    app.MapOpenApi();
    app.UseSwagger();
    app.UseSwaggerUI();
} else {
    app.UseHttpsRedirection();
}

app.MapControllers();

// attempt enitity-framework migrations at startup. love you stack overflow
using (var scope = app.Services.CreateScope()) {
    var db = scope.ServiceProvider.GetRequiredService<AppDbContext>();

    var retries = 10;
    while (retries-- > 0) {
        try {
            db.Database.Migrate();
            break;
        } catch {
            Thread.Sleep(5000);
        }
    }
}

app.Run();