Dockerfile

# We use Alpine as a base image and then install Node separately
# rather than using a Node base image because this enables automated tools to
# upgrade everything by simply updating the Alpine version.
#
# Alpine is updated every 6 months so all packages are pretty recent.
FROM alpine:3.13

RUN apk update && apk add --no-cache \
  chromium \
  git \
  make \
  nodejs \
  rsync \
  yarn \
  zip

# Do not download a Chrome build as part of installing the "puppeteer" package,
# it won't work in Alpine.
ENV PUPPETEER_SKIP_CHROMIUM_DOWNLOAD true

# Enable test scripts to detect that they are running from the Docker image.
ENV RUNNING_IN_DOCKER true