Node.js heap out of memory

If you want to increase the memory usage of the node globally - not only single script, you can export environment variable, like this:
export NODE_OPTIONS=--max_old_space_size=4096

Then you do not need to play with files when running builds like npm run build.

If I remember correctly, there is a strict standard limit for the memory usage in V8 of around 1.7 GB, if you do not increase it manually.

In one of our products we followed this solution in our deploy script:

 node --max-old-space-size=4096 yourFile.js

There would also be a new space command but as I read here: a-tour-of-v8-garbage-collection the new space only collects the newly created short-term data and the old space contains all referenced data structures which should be in your case the best option.