feat: setup db context with initial models

src/FiscalOS.API/Program.cs

@@ -1,8 +1,14 @@
+using FiscalOS.API.Data;
+
 var builder = WebApplication.CreateBuilder(args);
 
 builder.Services.AddValidation();
 builder.Services.AddOpenApi();
 
+builder.Services.ConfigureOptions<AppDbContextOptionsSetup>();
+builder.Services.AddDbContext<AppDbContext>();
+builder.Services.AddHostedService<MigrationService>();
+
 var app = builder.Build();
 
 if (app.Environment.IsDevelopment())