feat: Implement data retention policy

- Replaced `data_storage.py` with `database.py` to use SQLite instead of a JSON file for data storage.
- Added an `enforce_retention_policy` function to `database.py` to delete data older than 7 days.
- Called this function in the main monitoring loop in `monitor_agent.py`.
- Added Docker container monitoring.
- Updated `.gitignore` to ignore `monitoring.db`.

config.py

@@ -15,5 +15,8 @@ DAILY_RECAP_TIME = "18:28"
 NMAP_TARGETS = "192.168.2.0/24"
 NMAP_SCAN_OPTIONS = "-sS -T4 -R"
 
+# Docker Configuration
+DOCKER_CONTAINERS_TO_MONITOR = ["gitea","portainer","gluetun","mealie","n8n","minecraft"]
+
 # Test Mode (True to run once and exit, False to run continuously)
-TEST_MODE = False
+TEST_MODE = False