Another try with entrypoint rewrites

frontend/Dockerfile

@@ -43,7 +43,7 @@ COPY --from=builder /usr/src/app/certs/privkey.pem /etc/nginx/privkey.pem
 
 # install CONFD
 RUN apt-get update && apt-get install -y curl && apt-get clean
-COPY ./confd/templates/nginx.conf /etc/nginx/nginx.conf
+COPY ./confd/templates/nginx.conf /etc/nginx/nginx.conf.tmpl
 
 ## OLD CONFD THINGS (not compatible with arm) 
 #ENV CONFD_VERSION 0.16.0
@@ -51,10 +51,10 @@ COPY ./confd/templates/nginx.conf /etc/nginx/nginx.conf
 #    chmod +x /usr/local/bin/confd
 #COPY ./confd /etc/confd
 # rewrite command & entrypoint with ours
-#COPY ./entrypoint.sh /
-#ENTRYPOINT [ "/entrypoint.sh" ]
 
-RUN export BACKEND_HOSTNAME=shuffle-backend
+COPY ./entrypoint.sh /
+ENV BACKEND_HOSTNAME="shuffle-backend"
+ENTRYPOINT [ "/entrypoint.sh" ]
 CMD ["nginx", "-g", "daemon off;"]
 
 EXPOSE 80

frontend/confd/templates/nginx.conf

@@ -71,8 +71,7 @@ http {
 		}
 
 		location ~ /api/v(1|2) {
-			#proxy_pass http://{{ getenv "BACKEND_HOSTNAME" "shuffle-backend" }}:5001;
-			proxy_pass http://$BACKEND_HOSTNAME:5001;
+			proxy_pass http://${BACKEND_HOSTNAME}:5001;
 			proxy_buffering off;
 			proxy_http_version 1.1;
 
@@ -114,7 +113,8 @@ http {
 
 		# Get the hostname from environment here?
 		location ~ /api/v(1|2) {
-			proxy_pass http://$BACKEND_HOSTNAME:5001;
+			proxy_pass http://${BACKEND_HOSTNAME}:5001;
+
 			proxy_buffering off;
 			proxy_http_version 1.1;
 

frontend/entrypoint.sh

@@ -1,8 +1,6 @@
-#!/bin/bash
+#!/usr/bin/env sh
+set -eu
 
-# generate configs - is this necessary? 
-# Removing confd if possible
-#/usr/local/bin/confd -backend="env" -confdir="/etc/confd" -onetime
+envsubst '${BACKEND_HOSTNAME}' < /etc/nginx/nginx.conf.tmpl > /etc/nginx/nginx.conf
 
-# run main command
 exec "$@"