Add Docker image and compose for Needle web exports

Serve production Vite dist with nginx; optional SampleScene profile.

Made-with: Cursor

docker/nginx-default.conf

@@ -0,0 +1,20 @@
+server {
+    listen 80;
+    server_name localhost;
+    root /usr/share/nginx/html;
+    index index.html;
+
+    # SPA / static Needle export
+    location / {
+        try_files $uri $uri/ /index.html;
+    }
+
+    # wasm / glb / long cache for hashed assets (optional)
+    location ~* \.(wasm|glb|png|jpg|jpeg|webp|ico|svg)$ {
+        try_files $uri =404;
+        add_header Cache-Control "public, max-age=31536000, immutable";
+    }
+
+    gzip on;
+    gzip_types text/css application/javascript application/json image/svg+xml;
+}