I recently wrote an article about using alternative operative systems, especially MorphOS/Linux to recycle older machines and make them usable again.
As a programmer I was looking for a way to use older machines to do modern development. Object Pascal (FPC compiler) is a good solution, since it compiles to just about any platform as long as you avoid local API calls and stick to the RTL.
A second option, and the question I have to you -- is what about nodeJS?
I guess you have Apache as the server for MorphOS? Will NodeJS compile and install as expected on PPC hardware?