chore: add Dockerfile that installs necessary deps on Ubuntu Bionic

docker/Dockerfile.bionic

@@ -0,0 +1,33 @@
+################################################
+# 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 & XVFB
+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 && \
+    apt-get install -y xvfb
+
+