caddy: alias /dashboard to the real Node-RED dashboard path (#976)

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Co-authored-by: Sonny Piers <sonny@fairscope.com>

Author: babo989

os/caddy/Caddyfile

@@ -72,6 +72,16 @@
 		}
 	}
 
+	# alias /dashboard -> real Node-RED dashboard path
+	# FlowFuse Dashboard 2 reload-after-disconnect bug: when the WebSocket
+	# drops (laptop sleep, planktoscope reboot, etc.) the bundled JS calls
+	# new URL(window.location.origin + "/dashboard") to refresh, ignoring
+	# the actual httpNodeRoot. Without this alias the reload URL becomes
+	# /dashboard?reloadTime=... and falls through to the SPA 404 page.
+  # see https://github.com/FlowFuse/node-red-dashboard/issues/2149
+	redir /dashboard /ps/node-red-v2/dashboard/ 302
+	redir /dashboard/ /ps/node-red-v2/dashboard/ 302
+
 	# Frontend fallback (everything else)
 	handle {
 		root * /opt/PlanktoScope/frontend/dist