Add environment config loading and logging setup

internal/logging/logging.go

@@ -0,0 +1,16 @@
+package logging
+
+import (
+	"log/slog"
+	"os"
+)
+
+func New(debug bool) *slog.Logger {
+	level := slog.LevelInfo
+	if debug {
+		level = slog.LevelDebug
+	}
+
+	handler := slog.NewTextHandler(os.Stdout, &slog.HandlerOptions{Level: level})
+	return slog.New(handler)
+}