Merging PPTX

Developing function for merging multiple .pptx files for Node.js
I need a function for merging multiple .pptx files for Node.js.

Requirements:
– Input multiple .pptx files from local files.
– Output one .pptx which merged all slides sequentially(include title slide)
– The Node.js function will be used in Firebase Cloud functions.
– You can use any open-source libraries like
node-pptx, officegen, etc.
https://www.npmjs.com/package/nodejs-pptx
https://www.npmjs.com/package/officegen
– The function must be built as expres.js function.

I would be happy that you will apply this job!