Install chrome in codespaces via Dockerfile rather than use node-chromium package

* cribbed from github/auto-complete-element#88

Author: KyFaSt

.devcontainer/Dockerfile

@@ -14,3 +14,7 @@ FROM mcr.microsoft.com/vscode/devcontainers/javascript-node:0-${VARIANT}
 
 # [Optional] Uncomment if you want to install more global node modules
 # RUN su node -c "npm install -g <your-package-list-here>" 
+
+RUN wget -q -O - https://dl-ssl.google.com/linux/linux_signing_key.pub | apt-key add - \ 
+  && echo "deb http://dl.google.com/linux/chrome/deb/ stable main" >> /etc/apt/sources.list.d/google.list
+RUN apt-get update && apt-get -y install google-chrome-stable