feat: log to file

.env.example

@@ -10,6 +10,9 @@ SELECTOR_TYPE=xpath
 # Cache file location (stores the hash of previous content)
 CACHE_FILE=.cache/hash.txt
 
+# Optional: Log file path (leave empty to only log to console)
+LOG_FILE=.logs/alert.log
+
 # SMTP Email Configuration
 SMTP_HOST=smtp.gmail.com
 SMTP_PORT=587