Replace pnpm-lock.yaml with package-lock.json. The three overrides move to
package.json#overrides, including the request -> @cypress/request alias, which
npm supports as an override value. allowBuilds for es5-ext becomes
package.json#allowScripts. The Dockerfile installs with npm ci instead of
enabling corepack.
Add .gitignore for Node.js, package.json with dependencies (express, app-store-scraper, google-play-scraper), and package-lock.json. Update README with project description and usage instructions for API endpoints.