feat: initial Vite/React frontend service template

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

nginx/default.conf

@@ -0,0 +1,32 @@
+server {
+    listen 8080;
+    server_name _;
+    root /usr/share/nginx/html;
+
+    # Liveness/readiness for k8s probes.
+    location = /healthz {
+        access_log off;
+        default_type text/plain;
+        return 200 "ok\n";
+    }
+
+    # Runtime config, written at container start; never cache.
+    location = /config.js {
+        add_header Cache-Control "no-store" always;
+    }
+
+    # Hashed build assets: cache forever; a missing asset is a real 404.
+    location /assets/ {
+        add_header Cache-Control "public, max-age=31536000, immutable" always;
+        try_files $uri =404;
+    }
+
+    location = /index.html {
+        add_header Cache-Control "no-cache" always;
+    }
+
+    # SPA fallback: unknown paths get index.html; the router handles them.
+    location / {
+        try_files $uri /index.html;
+    }
+}