Organize backend into product executable and shared Go modules

backend/product/app/server/internal/server_test.go

@@ -0,0 +1,22 @@
+package server
+
+import (
+	"context"
+	"errors"
+	"testing"
+
+	"git.sendico.io/tech/sxchnge/product/app/api"
+	"go.uber.org/zap"
+)
+
+func TestShutdownCancelsLifecycleContextBeforeStartupCompletes(t *testing.T) {
+	instance, err := Create(zap.NewNop(), "config.yml", false, api.RuntimeConfig{})
+	if err != nil {
+		t.Fatalf("Create() error = %v", err)
+	}
+
+	instance.Shutdown()
+	if !errors.Is(instance.lifecycleCtx.Err(), context.Canceled) {
+		t.Fatalf("lifecycle context error = %v, want context.Canceled", instance.lifecycleCtx.Err())
+	}
+}