Adds Docker/Podman support with optimized multi-stage builds, automated OCI metadata extraction, and build script.

• Multi-stage Dockerfile with distroless runtime (~124MB production image )
• BuildKit cache mounts for faster rebuilds
• Automated build script (build/container.sh) with OCI label generation from package.json & git.
• 10x size reduction using @vercel/ncc bundling (~24MB to ~1.4MB

This PR does add the ncc dev dependency and a 'bundle' npm run script used in the container build, but does not change existing workflow.

New Files:

• Dockerfile - Optimized multi-stage build
• build/container.sh - Automated build tooling
• .dockerignore - Minimal build context

Updates:

• Added author/homepage to package.json
• Adds bundle run script to package.json
• Adds @vercel/ncc bundler dev dependency
• Updates README with container install instruction