working test deploy config

docker-entrypoint.sh

@@ -1,7 +1,8 @@
 #!/bin/sh
-# Render the nginx config template with environment variables, then start nginx.
+# Render config templates with environment variables, then start nginx.
 set -e
 
 envsubst '${API_UPSTREAM}' < /etc/nginx/conf.d/nginx.conf.template > /etc/nginx/conf.d/default.conf
+envsubst '${API_UPSTREAM},${API_PUBLIC_URL}' < /usr/share/nginx/html/config.json.template > /usr/share/nginx/html/config.json
 
 exec nginx -g 'daemon off;'