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

Needle/MenuScene/dist/assets/JsMaterialXGenShader.DFP9U7Gu.js

@@ -0,0 +1 @@
+import{c as e}from"./materialx.CnHmG--Y.js";export{e as default};