Dockerfile-tests

# This minimal Dockerfile is used to run Jest/Puppeteer-based integration tests
# for local development. It is based on the Docker image used to run the tests
# in CI. If you update this FROM statement, please _also_ update the image
# referenced in .circleci/config.yml.
FROM cimg/python:3.10-browsers

# This COPY/RUN block serves two purposes:
#  1. Seed the npm cache inside the Docker image
#  2. Ensure that the `node_modules` directory is created and owned by the
#     `circleci` user so we can volume it without permission issues.
COPY package.json package-lock.json ./
RUN npm install --no-save