add local service proxy with .numa domains

HTTP reverse proxy on port 80 lets developers use clean domain names
(frontend.numa, api.numa) instead of localhost:PORT. Includes WebSocket
upgrade support for HMR, TCP health checks, dashboard UI panel, and
REST API for service management. numa.numa is preconfigured for the
dashboard itself.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

numa.toml

@@ -13,6 +13,20 @@ max_entries = 10000
 min_ttl = 60
 max_ttl = 86400
 
+[proxy]
+enabled = true
+port = 80
+tld = "numa"
+
+# Pre-configured services (numa.numa is always added automatically)
+# [[services]]
+# name = "frontend"
+# target_port = 5173
+#
+# [[services]]
+# name = "api"
+# target_port = 8000
+
 # Example zone records:
 # [[zones]]
 # domain = "dimescu.ro"