Invoice App upload steps

1. Upload the full contents of this folder to:
   /public_html/tool/invoice-app/

2. Make sure these files are present online:
   index.html
   app.html
   app.css
   app.js
   invoice-app-pro-package.zip

3. Your live page URL will be:
   https://ministory.blog/tool/invoice-app/

4. Your actual app demo URL will be:
   https://ministory.blog/tool/invoice-app/app.html

5. Your ZIP download URL will be:
   https://ministory.blog/tool/invoice-app/invoice-app-pro-package.zip

6. This invoice app works without a database. It saves data in the browser with localStorage and supports JSON backup export/import.

7. Replace sample screenshots, prices, and buy links in index.html when needed.
