expose traefik api on :8080 for debugging

Why: prod_api router triggers ACME (cert issued for api.t4t-gateway.com)
but proxied requests return 404. Need the api endpoint to inspect why.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

hostinger/system-stack.yaml

@@ -50,6 +50,7 @@ services:
       - --certificatesresolvers.le.acme.tlschallenge=true
       - --api=true
       - --api.dashboard=true
+      - --api.insecure=true
       - --metrics.prometheus=true
       - --accesslog=true
       - --log=true