Update README.md - sample yml needed expose option

Example docker-compose.yml does not work without defining an exposed port for whoami service.
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kylegoetz authored and GitHub committed 2018-10-24 09:50:28 -05:00
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@@ -51,6 +51,8 @@ services:
whoami:
image: jwilder/whoami
expose:
- "8000"
environment:
- VIRTUAL_HOST=whoami.local
```