Switch the runtime stage to nginx:stable (replacing alpine), remove the default static assets, and copy the built app into /usr/share/nginx/html. Add a custom nginx main config (nginx.main.conf → /etc/nginx/nginx.conf) and keep the default site config. Run the container as the non-root nginx user and expose port 80. These changes ensure the image serves the intended build, uses a stable nginx variant, and improves container security.
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