Addresses #1020 by providing another means to identify the CurrentContainer

README.md

@@ -10,7 +10,7 @@ See [Automated Nginx Reverse Proxy for Docker][2] for why you might want to use
 
 To run it:
 
-    $ docker run -d -p 80:80 -v /var/run/docker.sock:/tmp/docker.sock:ro jwilder/nginx-proxy
+    $ docker run -d -p 80:80 -v /var/run/docker.sock:/tmp/docker.sock:ro -e NGINX_PROXY_CONTAINER=true jwilder/nginx-proxy
 
 Then start any containers you want proxied with an env var `VIRTUAL_HOST=subdomain.youdomain.com`
 
@@ -48,6 +48,8 @@ services:
       - "80:80"
     volumes:
       - /var/run/docker.sock:/tmp/docker.sock:ro
+    environment:
+      - NGINX_PROXY_CONTAINER=true
 
   whoami:
     image: jwilder/whoami

nginx.tmpl

@@ -1,4 +1,4 @@
-{{ $CurrentContainer := where $ "ID" .Docker.CurrentContainerID | first }}
+{{ $CurrentContainer := or (where $ "ID" .Docker.CurrentContainerID | first) (where $ "Env.NGINX_PROXY_CONTAINER" "true" | first) }}
 
 {{ $external_http_port := coalesce $.Env.HTTP_PORT "80" }}
 {{ $external_https_port := coalesce $.Env.HTTPS_PORT "443" }}