feat(service): implement graceful shutdown for HTTP server

Add a context with timeout to handle graceful shutdown of the HTTP 
server. Update error handling during the server's close to include 
context-aware shutdown. Ensure that the server properly logs only 
non-closed errors when listening.

logging/log.go

@@ -0,0 +1,52 @@
+package logging
+
+import (
+	"context"
+	"log/slog"
+	"os"
+)
+
+type Logger interface {
+	Info(msg string, args ...any)
+	Warn(msg string, args ...any)
+	Error(msg string, args ...any)
+}
+
+var defaultLogger *slog.Logger
+
+type contextKey string
+
+const loggerKey = contextKey("logger")
+
+func SetupLogger(logLevel, serviceName, buildVersion string) *slog.Logger {
+	var leveler slog.LevelVar
+
+	err := leveler.UnmarshalText([]byte(logLevel))
+
+	defaultLogger = slog.New(slog.NewJSONHandler(os.Stdout, &slog.HandlerOptions{
+		AddSource:   false,
+		Level:       leveler.Level(),
+		ReplaceAttr: nil,
+	})).With("service", serviceName).With("version", buildVersion)
+
+	if err != nil {
+		defaultLogger.With("err", err).Error("Failed to parse log level")
+		os.Exit(1)
+	}
+	slog.SetDefault(defaultLogger)
+	return defaultLogger
+}
+
+// ContextWithLogger returns a new Context with the logger attached
+func ContextWithLogger(ctx context.Context, logger *slog.Logger) context.Context {
+	return context.WithValue(ctx, loggerKey, logger)
+}
+
+// LoggerFromContext returns a logger from the passed context or the default logger
+func LoggerFromContext(ctx context.Context) *slog.Logger {
+	logger := ctx.Value(loggerKey)
+	if l, ok := logger.(*slog.Logger); ok {
+		return l
+	}
+	return defaultLogger
+}

logging/mocklogger.go

@@ -0,0 +1,48 @@
+package logging
+
+import (
+	"bytes"
+	"log/slog"
+	"strings"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func NewMockLogger() *MockLogger {
+	logged := &bytes.Buffer{}
+
+	return &MockLogger{
+		logged: logged,
+		logger: slog.New(slog.NewTextHandler(logged, &slog.HandlerOptions{
+			ReplaceAttr: func(groups []string, a slog.Attr) slog.Attr {
+				if a.Key == "time" {
+					return slog.Attr{}
+				}
+				return a
+			},
+		})),
+	}
+}
+
+type MockLogger struct {
+	logger *slog.Logger
+	logged *bytes.Buffer
+}
+
+func (m *MockLogger) Logger() *slog.Logger {
+	return m.logger
+}
+
+func (m *MockLogger) Check(t testing.TB, wantLogged []string) {
+	var gotLogged []string
+	if m.logged.String() != "" {
+		gotLogged = strings.Split(m.logged.String(), "\n")
+		gotLogged = gotLogged[:len(gotLogged)-1]
+	}
+	if len(wantLogged) == 0 {
+		assert.Empty(t, gotLogged)
+		return
+	}
+	assert.Equal(t, wantLogged, gotLogged)
+}