fix: simplify database connection string handling in Program.cs #3

Api/Program.cs

@@ -48,14 +48,11 @@ namespace Api
             });
 
             builder.Services.AddControllers();
+
             // Add DbContext with SQL Server
             // Allow connection string to be set via environment variable (e.g., in Docker)
-            var envConnectionString = Environment.GetEnvironmentVariable("DB_CONNECTION_STRING");
-            var connectionString = !string.IsNullOrWhiteSpace(envConnectionString)
-                ? envConnectionString
-                : builder.Configuration.GetConnectionString("DefaultConnection");
             builder.Services.AddDbContext<AppDbContext>(options =>
-                options.UseSqlServer(connectionString));
+                options.UseSqlServer(builder.Configuration.GetConnectionString("DefaultConnection")));
 
             // Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
             builder.Services.AddEndpointsApiExplorer();