I want to make a node.js server that converts documents into ppt presentations. I think I will use Open Office for this job but I am not sure how to start and if someone can help into pointing me towards a good direction and maybe some tutorials on how to use Open Office maybe in other programming languages.
If you're not planing on doing the conversion yourself, you should start by finding a command line tool or a node.js library that does the conversion. Then build the web service around it.