Dockerfile

FROM node:14.18.1-buster

WORKDIR /srv/app

# Show vebose error messages in Express.
ENV NODE_ENV=development

# Install Chromium dependencies and Chromium.
RUN apt-get update && apt-get install -y \
  ca-certificates \
  fonts-liberation \
  libappindicator3-1 \
  libasound2 \
  libatk-bridge2.0-0 \
  libatk1.0-0 \
  libc6 \
  libcairo2 \
  libcups2 \
  libdbus-1-3 \
  libexpat1 \
  libfontconfig1 \
  libgbm1 \
  libgcc1 \
  libglib2.0-0 \
  libnspr4 \
  libgtk-3-0 \
  libnss3 \
  libpango-1.0-0 \
  libpangocairo-1.0-0 \
  libstdc++6 \
  libx11-6 \
  libx11-xcb1 \
  libxcb1 \
  libxcomposite1 \
  libxcursor1 \
  libxdamage1 \
  libxext6 \
  libxfixes3 \
  libxi6 \
  libxrandr2 \
  libxrender1 \
  libxss1 \
  libxtst6 \
  lsb-release \
  wget \
  xdg-utils \
  && apt-get install -y chromium \
  && rm -rf /var/lib/apt/lists/*

# Install Node modules.
COPY ["background-generator/package*.json", "./"]
RUN npm install --loglevel=notice

# Copy files, switch to unprivileged user and start the script.
COPY --chown=node:node background-generator/ .
USER node
EXPOSE 3000
CMD ["node", "generate-background.js"]