cleanup old errors

.env.example

@@ -45,4 +45,8 @@ ADMIN_DOMAINS="example.com,foo.net"
 # token name used for logging in - has to be a valid DNS TXT key
 LOGIN_TOKEN_NAME="localhost"
 # completely disable any health checks - debugging only
-DISABLE_HEALTH_CHECKS=false
+DISABLE_HEALTH_CHECKS=false
+# interval in seconds to cleanup old data like errors stored
+CLEANUP_INTERVAL_S=86400
+# amount of errors to keep per host
+ERROR_RETENTION_PER_HOST=100