Update Dockerfile to support CodeceptJS 3.x.

Dockerfile

@@ -1,5 +1,5 @@
-ARG NODE_VERSION=12.10.0
-FROM node:${NODE_VERSION}
+# Download Playwright and its dependencies
+FROM mcr.microsoft.com/playwright:bionic
 
 # Add our user and group first to make sure their IDs get assigned consistently,
 # regardless of whatever dependencies get added.
@@ -10,33 +10,12 @@ RUN apt-get update && \
       apt-get install -y libgtk2.0-0 libgconf-2-4 \
       libasound2 libxtst6 libxss1 libnss3 xvfb
 
-# Install latest chrome dev package.
-# 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 --no-install-recommends \
-    && 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-unstable \
-      --no-install-recommends \
-    && apt-get install -y libgbm1 \
-    && rm -rf /var/lib/apt/lists/* \
-    && apt-get purge --auto-remove -y curl \
-    && rm -rf /src/*.deb
-
-# Uncomment to skip the chromium download when installing puppeteer. If you do,
-# you'll need to launch puppeteer with:
-#     browser.launch({executablePath: 'google-chrome-unstable'})
-# ENV PUPPETEER_SKIP_CHROMIUM_DOWNLOAD true
-
-
 # Add pptr user.
 RUN groupadd -r pptruser && useradd -r -g pptruser -G audio,video pptruser \
     && mkdir -p /home/pptruser/Downloads \
     && chown -R pptruser:pptruser /home/pptruser \
     && chown -R pptruser:pptruser /home/pptruser
 
-
 #RUN mkdir /home/codecept
 
 COPY . /codecept