WIP for twelve factor talk

load_balancer/Dockerfile

@@ -1,2 +1,16 @@
 FROM nginx:1.23
+ARG    CONSUL_TEMPLATE_VERSION=0.30.0
+# we define an environment variable with the location of our Consul cluster. By default, it will try to resolve to
+# consul-client:8500 which would be the behavior if we have Consul running as a container in the same host and we link it to this
+# Nginx container (with the alias consul, of course). But this environment variable can also be overridden when we run the
+# container if we want to point somewhere else.
+ENV 	 CONSUL_URL consul-client:8500
+
+# download the latest version of Consul Template and we put it on /usr/local/bin
+ADD 	 https://releases.hashicorp.com/consul-template/${CONSUL_TEMPLATE_VERSION}/consul-template_${CONSUL_TEMPLATE_VERSION}_linux_amd64.zip /usr/bin/
+RUN 	 unzip /usr/bin/consul-template_${CONSUL_TEMPLATE_VERSION}_linux_amd64.zip && \
+    	 mv consul-template /usr/local/bin/consul-template && \
+    	 rm -rf /usr/bin/consul-template_${CONSUL_TEMPLATE_VERSION}_linux_amd64.zip
+
+
 COPY nginx.conf /etc/nginx/nginx.conf