refactor: extract server from main.go to it's own package

internal/server/server.go

@@ -0,0 +1,67 @@
+package server
+
+import (
+	"context"
+	"fmt"
+	"time"
+
+	fiberzap "github.com/gofiber/contrib/fiberzap/v2"
+	"github.com/gofiber/fiber/v2"
+	"go.uber.org/zap"
+)
+
+type Server struct {
+	port   int
+	logger *zap.Logger
+}
+
+func NewServer(port int, logger *zap.Logger) *Server {
+	return &Server{
+		port:   port,
+		logger: logger,
+	}
+}
+
+func (s *Server) Run(ctx context.Context) {
+	sugared := s.logger.Sugar()
+
+	config := fiber.Config{
+		DisableStartupMessage: true,
+
+		IdleTimeout:  10 * time.Second,
+		ReadTimeout:  10 * time.Second,
+		WriteTimeout: 10 * time.Second,
+	}
+
+	app := fiber.New(config)
+
+	app.Use(fiberzap.New(fiberzap.Config{
+		Logger: s.logger,
+	}))
+
+	app.Get("/", func(c *fiber.Ctx) error {
+		return c.SendString("Hello, World!")
+	})
+
+	go func() {
+		err := app.Listen(fmt.Sprintf(":%d", s.port))
+		if err != nil {
+			panic(err)
+		}
+	}()
+
+	sugared.Infow("HTTP server is now running", "port", s.port)
+
+	<-ctx.Done()
+	shutdownBegan := time.Now()
+
+	sugared.Infoln("Shutting HTTP server down gracefully...")
+	err := app.ShutdownWithTimeout(10 * time.Second)
+	if err != nil {
+		panic(err)
+	}
+
+	// Cleanup code here
+
+	sugared.Infow("HTTP server shut down gracefully.", "took", time.Since(shutdownBegan))
+}