Update docker node image to use NVM

[ericis]

Currently, the node docker image installs a specific version of Node. Instead, it should install NVM and then install a specific version as the default.

panda/src/docker/devops/node/Dockerfile

Lines 24 to 35 in d49a5e4

	# install node
	RUN curl -sL https://deb.nodesource.com/setup_${NODE_MAJOR_VERSION}.x | bash - \
	&& apt-get update \
	&& DEBIAN_FRONTEND=noninteractive \
	apt-get install -y --no-install-recommends \
	nodejs \
	# clean up layer: https://docs.docker.com/develop/develop-images/dockerfile_best-practices/#run
	&& rm -rf /var/lib/apt/lists/* \
	# ensure latest npm
	&& npm install -g npm@latest \
	# install yarn
	&& npm install -g yarn