Install blockexplorer dependencies

net/scripts/install-nodejs.sh

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+#
+# Reference: https://github.com/nodesource/distributions/blob/master/README.md#deb
+#
+set -ex
+
+[[ $(uname) = Linux ]] || exit 1
+[[ $USER = root ]] || exit 1
+
+# Install node/npm
+curl -sL https://deb.nodesource.com/setup_10.x | bash -
+apt-get install -y nodejs
+node --version
+npm --version
+
+# Install yarn
+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
+apt-get update -qq
+apt-get install -y yarn
+yarn --version