Initial project scaffold with frontend dashboard and Caddy config

Frontend-first status board with mock data for 16 vendors.
Caddy configured on port 8443 with internal TLS, coexisting
with an existing Caddy instance (admin on 2020, no HTTP redirects).

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

.gitignore

@@ -0,0 +1,10 @@
+# Executables (provided manually, not tracked in git)
+bin/caddy/*.exe
+bin/nssm/*.exe
+
+# Node
+backend/node_modules/
+
+# OS files
+Thumbs.db
+Desktop.ini