[hw-8] add: comment service

comments/cmd/server/main.go

@@ -0,0 +1,42 @@
+package main
+
+import (
+	"context"
+	"net/http"
+	"os"
+	"os/signal"
+	"syscall"
+	"time"
+
+	"github.com/rs/zerolog/log"
+
+	"route256/comments/internal/app"
+)
+
+func main() {
+	srv, err := app.NewApp(os.Getenv("CONFIG_FILE"))
+	if err != nil {
+		log.Fatal().Err(err).Msg("failed creating app")
+	}
+
+	ctx, stop := signal.NotifyContext(context.Background(), syscall.SIGINT, syscall.SIGTERM)
+	defer stop()
+
+	go func() {
+		if err := srv.ListenAndServe(ctx); err != nil && err != http.ErrServerClosed {
+			log.Fatal().Err(err).Msg("serving error")
+		}
+	}()
+
+	<-ctx.Done()
+	log.Info().Msg("shutdown signal received")
+
+	shutdownCtx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
+
+	if err := srv.Shutdown(shutdownCtx); err != nil {
+		log.Error().Err(err).Msg("graceful shutdown failed")
+	} else {
+		log.Info().Msg("server stopped gracefully")
+	}
+}