Replace pnpm-lock.yaml with package-lock.json. The seven security overrides
move to package.json#overrides, including the two version-scoped
brace-expansion entries, which npm resolves per major branch the same way
pnpm did.
pnpm-workspace.yaml's allowBuilds becomes package.json#allowScripts: npm 11
gates dependency install scripts the same way, so sharp and unrs-resolver stay
explicitly approved rather than silently enabled.
Introduces a new index.html file providing a web interface to fetch and export USD exchange rates from BIDV for a selected date range. The README is updated with feature descriptions and relevant API endpoints.