feat: add Go backend compatibility service scaffold

go-backend/internal/app/app.go

@@ -0,0 +1,53 @@
+package app
+
+import (
+	"context"
+	"fmt"
+	"net/http"
+	"time"
+
+	"go-backend/internal/config"
+	httpserver "go-backend/internal/http"
+	"go-backend/internal/http/handler"
+	"go-backend/internal/store/sqlite"
+)
+
+type App struct {
+	cfg    config.Config
+	server *http.Server
+	repo   *sqlite.Repository
+}
+
+func New(cfg config.Config) (*App, error) {
+	repo, err := sqlite.Open(cfg.DBPath)
+	if err != nil {
+		return nil, fmt.Errorf("open sqlite: %w", err)
+	}
+
+	h := handler.New(repo, cfg.JWTSecret)
+	router := httpserver.NewRouter(h, cfg.JWTSecret)
+
+	s := &http.Server{
+		Addr:              cfg.Addr,
+		Handler:           router,
+		ReadTimeout:       30 * time.Second,
+		ReadHeaderTimeout: 5 * time.Second,
+		WriteTimeout:      30 * time.Second,
+		IdleTimeout:       60 * time.Second,
+	}
+
+	return &App{cfg: cfg, server: s, repo: repo}, nil
+}
+
+func (a *App) Run() error {
+	return a.server.ListenAndServe()
+}
+
+func (a *App) Shutdown(ctx context.Context) error {
+	shutdownErr := a.server.Shutdown(ctx)
+	closeErr := a.repo.Close()
+	if shutdownErr != nil {
+		return shutdownErr
+	}
+	return closeErr
+}