add node 12 dockerfile

node_12.x.dockerfile

@@ -0,0 +1,22 @@
+FROM praekeltfoundation/vumi:0.6.18-pypy
+MAINTAINER Praekelt Foundation <[email protected]>
+
+# Install nodejs 12.x LTS release
+RUN apt-get-install.sh apt-transport-https curl gnupg2 && \
+    curl -s https://deb.nodesource.com/gpgkey/nodesource.gpg.key \
+        | apt-key add - && \
+    echo "deb https://deb.nodesource.com/node_12.x jessie main" \
+        > /etc/apt/sources.list.d/nodesource.list && \
+    apt-get-purge.sh curl gnupg2
+
+ENV NODEJS_VERSION "12.16.3"
+RUN apt-get-install.sh nodejs=${NODEJS_VERSION}*
+
+
+
+ENV VXSANDBOX_VERSION "0.6.2a3"
+RUN apt-get-install.sh gcc && \
+    pip install vxsandbox==$VXSANDBOX_VERSION && \
+    apt-get-purge.sh gcc
+
+ENV WORKER_CLASS "vxsandbox.worker.StandaloneJsFileSandbox"