Commit Needle production dist and nginx-only Docker image

- Track Needle/MenuScene/dist and Needle/SampleScene/dist for container deploys
- Dockerfile copies pre-built dist (no npm in image); rebuild with npm run build before commit
- Fix Needle .gitignore: /assets/ so dist/assets is not ignored
- Git LFS: track *.wasm; relax .dockerignore so dist is sent as build context

Made-with: Cursor

.gitignore

@@ -21,7 +21,7 @@
 
 # Node / Needle web builds
 **/node_modules/
-Needle/**/dist/
+# Needle/*/dist/ is committed for Docker (rebuild with npm run build before commit)
 
 # OS
 .DS_Store