Thanks! That worked like a charm.

With jsreport-3.13.0, it was possible to make changes to the docker image as root and install/update additional package with the apk command.

Jsreport 4 seems to limit that possibility. It still appears to be possible to make some customization as described here.

But what if I want to do the following? How would I do that?

RUN apk add 'libhwy<=1.0.6' \
    && apk update \
    && apk upgrade \
    && npm cache clean -f \
    && npm install -g n \
    && npm update -y