Restructured docker images heirarchy

docker/Dockerfile.certbot-node

@@ -0,0 +1,21 @@
+FROM nginxproxymanager/nginx-full:${CERTBOT_BASE_TAG:-certbot}
+LABEL maintainer="Jamie Curnow <jc@jc21.com>"
+
+ARG TARGETPLATFORM
+RUN echo "Node: nginxproxymanager/nginx-full:${BASE_TAG:-certbot}, ${TARGETPLATFORM:-linux/amd64}" >> /built-for-arch
+
+ENV CURL_CA_BUNDLE=/etc/ssl/certs/ca-certificates.crt
+
+RUN curl -fsSL https://deb.nodesource.com/setup_16.x | bash - \
+	&& apt-get update \
+	&& apt-get install -y gcc make g++ git nodejs \
+	&& apt-get clean \
+	&& rm -rf /var/lib/apt/lists/* \
+	&& npm install -g yarn
+
+# Check nodejs works on this architecture
+COPY ./files/test.js /tmp/test.js
+RUN node /tmp/test.js \
+	&& rm -f /tmp/test.js
+
+LABEL org.label-schema.cmd="docker run --rm -ti nginxproxymanager/nginx-full:certbot-node"