feat: add Dockerfile (#8315)

This PR adds an official Dockerfile for Puppeteer. The content of the Dockerfile is practically the same as documented in troubleshooting.md:

1) It installs chrome-stable and dependencies via apt-get.
2) it installs a local Puppeteer build into the docker user's home folder.
3) configures required permissions for the user.
4) outputs licenses into the THIRD_PARTY_NOTICES file.

The local Puppeteer build is created by `docker/pack.sh` which is meant to be used in CI. This PR also includes a GitHub action that would build a docker image and run a smote test inside of it.

The next step would be actually publishing the docker image from GitHub Actions to GitHub Registry.

docker/Dockerfile

@@ -0,0 +1,31 @@
+FROM node:16
+
+# Install latest chrome dev package and fonts to support major charsets (Chinese, Japanese, Arabic, Hebrew, Thai and a few others)
+# Note: this installs the necessary libs to make the bundled version of Chromium that Puppeteer
+# installs, work.
+RUN apt-get update \
+    && apt-get install -y wget gnupg \
+    && wget -q -O - https://dl-ssl.google.com/linux/linux_signing_key.pub | apt-key add - \
+    && sh -c 'echo "deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main" >> /etc/apt/sources.list.d/google.list' \
+    && apt-get update \
+    && apt-get install -y google-chrome-stable fonts-ipafont-gothic fonts-wqy-zenhei fonts-thai-tlwg fonts-kacst fonts-freefont-ttf libxss1 \
+      --no-install-recommends \
+    && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /home/pptruser
+
+COPY puppeteer-latest.tgz /home/pptruser/puppeteer-latest.tgz
+
+# Install puppeteer into /home/pptruser/node_modules.
+RUN npm i ./puppeteer-latest.tgz \
+    && rm puppeteer-latest.tgz \
+    # Add user so we don't need --no-sandbox.
+    # same layer as npm install to keep re-chowned files from using up several hundred MBs more space
+    && groupadd -r pptruser && useradd -r -g pptruser -G audio,video pptruser \
+    && mkdir -p /home/pptruser/Downloads \
+    && chown -R pptruser:pptruser /home/pptruser \
+    && (node -e "require('child_process').execSync(require('puppeteer').executablePath() + ' --credits', {stdio: 'inherit'})" > THIRD_PARTY_NOTICES)
+
+USER pptruser
+
+CMD ["google-chrome-stable"]