fix(compose.yml): add sample extra_hosts for simplicity

README.md

@@ -163,10 +163,10 @@ PUT /{page}/
 ```
 
 ```bash
-# create /my-website/ that proxies to http://localhost:8000
+# create /my-website/ that proxies to http://host.containers.internal:8000
 curl -X PUT \
   -H 'X-Token: <TOKEN>' \
-  -H 'X-Proxy: http://localhost:8000' \
+  -H 'X-Proxy: http://host.containers.internal:8000' \
   https://stapler-host/my-project/
 ```
 

compose.example.yml

@@ -16,6 +16,8 @@ services:
     ports:
       - "80:80"
       - "443:443"
+    extra_hosts:
+      - "host.containers.internal:host-gateway"
     volumes:
       - "./data:/data"
       - "./letsencrypt:/etc/letsencrypt"
@@ -28,4 +30,3 @@ services:
       - "./letsencrypt:/etc/letsencrypt"
       - "./crontab:/etc/crontabs/root"
     entrypoint: /usr/sbin/crond -f
-