diff --git a/nginx-envtpl/README.md b/nginx-envtpl/README.md
index 0c29872..068e6e7 100644
--- a/nginx-envtpl/README.md
+++ b/nginx-envtpl/README.md
@@ -5,5 +5,49 @@ Nginx image with support for environment variables using [envtpl](https://github
 ## Usage
 
 ```sh
-$ docker run -d -p 80:80 -v ./nginx.conf.tpl:/etc/nginx/nginx.conf.tpl schickling/nginx-envtpl
+$ docker run -d -p 80:80 -e NGINX_WORKER_RLIMIT_NOFILE=... -v ./nginx.conf.tpl:/etc/nginx/nginx.conf.tpl schickling/nginx-envtpl
 ```
+
+### Example `nginx.conf.tpl`
+
+```nginx
+worker_processes auto;
+worker_rlimit_nofile {{ NGINX_WORKER_RLIMIT_NOFILE }};
+error_log /dev/stdout info;
+
+events {
+    worker_connections {{ NGINX_WORKER_CONNECTIONS }};
+    use epoll;
+    multi_accept on;
+}
+
+http {
+
+    proxy_cache_path /tmp/nginx levels=1:2 keys_zone=my_zone:10m inactive=60m;
+
+    access_log /dev/stdout;
+
+    server {
+
+        listen 80 backlog={{ NGINX_BACKLOG }};
+        root /usr/share/nginx/html/;
+        index index.html;
+
+        server_name localhost;
+
+        charset utf-8;
+
+        location / {
+            proxy_pass {{ NGINX_PROXY_ADDR }};
+            proxy_cache my_zone;
+            proxy_cache_methods POST;
+            proxy_cache_key "$request_uri|$request_body";
+            proxy_cache_valid 5s;
+            proxy_cache_use_stale error timeout updating;
+
+            add_header X-Proxy-Cache $upstream_cache_status;
+        }
+    }
+
+}
+```
\ No newline at end of file