refactor Dockerfile to avoid hardcoded versioning of Playwright

e2e-tests/playwright/Dockerfile

@@ -1,14 +1,42 @@
 ###############################################################################
-# Dockerfile to create a ready to use Playwright Docker image for end-to-end
-# testing
+# Dockerfile to create a ready-to-use Playwright Docker image for end-to-end
+# testing.
+#
+# To avoid hardcoded versoning of Playwright, this Dockerfile is a custom
+# version of the ready-to-use Dockerfile privided by Playwright developement
+# (https://github.com/microsoft/playwright/blob/main/utils/docker/Dockerfile.focal)
+#
+# Here the latest stable versions of the browsers Chromium, Firefox, and Webkit
+# (Safari) are installed, icluding all dependencies based on Ubuntu specified by
+#  Playwright developement.
 ###############################################################################
-ARG PLAYWIRGHT_VERSION=1.23.2
 
-FROM mcr.microsoft.com/playwright:v$PLAYWIRGHT_VERSION-focal
+FROM ubuntu:focal
 
-WORKDIR /tests
+# set a timezone for the Playwright browser dependency installation
+ARG TZ=Europe/Berlin
 
-RUN npm install playwright@$PLAYWIRGHT_VERSION
-RUN npm install -D @playwright/test
+ARG DOCKER_WORKDIR=/tests/
+WORKDIR $DOCKER_WORKDIR
 
-COPY tests/ /tests
+# package manager preparation
+RUN apt-get -qq update && apt-get install -qq -y curl gpg > /dev/null
+# for Node.js
+RUN curl -sL https://deb.nodesource.com/setup_16.x | bash -
+# for Yarn
+RUN curl -sL https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add - && \
+  echo "deb https://dl.yarnpkg.com/debian/ stable main" | tee /etc/apt/sources.list.d/yarn.list
+
+# install node v16 and Yarn
+RUN apt-get -qq update && apt-get install -qq -y nodejs yarn
+
+COPY tests/package.json tests/yarn.lock $DOCKER_WORKDIR
+
+# install Playwright with all dependencies
+# for the browsers chromium, firefox, and webkit
+RUN yarn install && yarn playwright install --with-deps
+
+# clean up
+RUN rm -rf /var/lib/apt/lists/* && apt-get -qq clean
+
+COPY tests/ $DOCKER_WORKDIR