Do not replace wrong variables

Author: entantoencuanto

docker/replace_nginx_env_variables.sh

@@ -1,3 +1,3 @@
 #!/bin/sh
-envsubst < /etc/nginx/sites-enabled/decidim-diba.conf > /etc/nginx/sites-enabled/decidim-diba-overriden.conf
-mv /etc/nginx/sites-enabled/decidim-diba-overriden.conf /etc/nginx/sites-enabled/decidim-diba.conf
+envsubst '$PASSENGER_MIN_INSTANCES $PASSENGER_MAX_POOL_SIZE' < /etc/nginx/sites-enabled/decidim-diba.conf > /etc/nginx/sites-enabled/decidim-diba-overriden.conf
+mv /etc/nginx/sites-enabled/decidim-diba-overriden.conf /etc/nginx/sites-enabled/decidim-diba.conf