Remove preload from build - model loads at runtime instead

Update Dockerfile: use correct onnxruntime-web version path for wasm files

Fix: copy WASM binaries to where onnxruntime-web expects them

Fix: create onnxruntime-node stub that redirects to onnxruntime-web

Fix: remove onnxruntime-node after install, force WASM fallback

Simplify Dockerfile

Update Dockerfile: add npm cache clean for smaller image

Add Dockerfile for Alpine