Add usage example to `README.md`

README.md

@@ -9,6 +9,43 @@ Certbot github: https://github.com/certbot/certbot
 
 This repository was originally forked from `@henridwyer`, many thanks to him for the good idea.  I've rewritten about 90% of this repository, so it bears almost no resemblance to the original.  This repository is _much_ more opinionated about the structure of your webservers/containers, however it is easier to use as long as all of your webservers follow that pattern.
 
+# Usage
+
+Use this image with a `Dockerfile` such as:
+```Dockerfile
+FROM staticfloat/nginx-certbot
+COPY *.conf /etc/nginx/conf.d/
+```
+
+And a `.conf` file such as:
+```nginx
+server {
+    listen              443 ssl;
+    server_name         server.company.com;
+    ssl_certificate     /etc/letsencrypt/live/server.company.com/fullchain.pem;
+    ssl_certificate_key /etc/letsencrypt/live/server.company.com/privkey.pem;
+
+    location / {
+        ...
+    }
+}
+```
+
+Wrap this all up with a `docker-compose.yml` file:
+```yml
+version: '3'
+services:
+    frontend:
+        restart: unless-stopped
+        build: frontend
+        ports:
+            - 80:80/tcp
+            - 443:443/tcp
+        environment:
+            - CERTBOT_EMAIL=owner@company.com
+  ...
+```
+
 # Changelog
 
 ### 0.8