feat: add a playwright-ready docker image (#1161)

docs/docker/Dockerfile.bionic

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+################################################
+# Compile with:
+#     sudo docker build -t microsoft/playwright:bionic -f Dockerfile.bionic .
+#
+# Run with:
+#     sudo docker run -d -p --rm --name playwright microsoft/playwright:bionic
+#
+#################################################
+
+FROM ubuntu:bionic
+
+# 1. Install node12
+RUN apt-get update && apt-get install -y curl && \
+    curl -sL https://deb.nodesource.com/setup_12.x | bash - && \
+    apt-get install -y nodejs
+
+# 2. Install WebKit dependencies
+RUN apt-get install -y libwoff1 \
+                       libopus0 \
+                       libwebp6 \
+                       libwebpdemux2 \
+                       libenchant1c2a \
+                       libgudev-1.0-0 \
+                       libsecret-1-0 \
+                       libhyphen0 \
+                       libgdk-pixbuf2.0-0 \
+                       libegl1 \
+                       libnotify4 \
+                       libxslt1.1 \
+                       libevent-2.1-6 \
+                       libgles2 \
+                       libvpx5
+
+# 3. Install Chromium dependencies
+
+RUN apt-get install -y libnss3 \
+                       libxss1 \
+                       libasound2
+
+# 4. Install Firefox dependencies
+
+RUN apt-get install -y libdbus-glib-1-2
+
+# 5. Add user so we don't need --no-sandbox in Chromium
+RUN groupadd -r pwuser && useradd -r -g pwuser -G audio,video pwuser \
+    && mkdir -p /home/pwuser/Downloads \
+    && chown -R pwuser:pwuser /home/pwuser
+
+# Run everything after as non-privileged user.
+USER pwuser

docs/docker/README.md

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+# Running Playwright in Docker
+
+`Dockerfile.bionic` is a playwright-ready image of playwright.
+This image includes all the dependencies needed to run browsers in a Docker
+container.
+
+Building image:
+
+```
+$ sudo docker build -t microsoft/playwright:bionic -f Dockerfile.bionic .
+```
+
+Running image:
+
+```
+$ sudo docker container run -it --rm --security-opt seccomp=chrome.json microsoft/playwright /bin/bash
+```
+
+> **NOTE**: The seccomp profile is coming from Jessie Frazelle. It's needed
+> to run Chrome without sandbox.
+