fix: #206 sum requests count by status code

Author: bohdan-shulha

Diff for: app/Http/Controllers/NodeController.php

@@ -83,7 +83,7 @@ public function show(Node $node)
             alias(round(ptah_node_disk_used_bytes{path="/"} / ptah_node_disk_total_bytes{path="/"} * 100), "disk_usage"),
             alias(round(rate(ptah_node_network_rx_bytes / 1024)), "network_rx_bytes"),
             alias(round(rate(ptah_node_network_tx_bytes / 1024)), "network_tx_bytes"),
-            alias(round(increase(ptah_caddy_http_requests_count)), "http_requests_count"),
+            alias(round(sum(increase(ptah_caddy_http_requests_count)) by (status_code)), "http_requests_count"),
             alias(sum(increase(ptah_caddy_http_requests_duration_bucket)) by (le), "http_requests_duration"),
         )
         QUERY;