[DOCKER] Failure on starting nginx image

You may get some error something like 

```
ERROR: for docker_nginx_1  Cannot start service nginx: driver failed programming external connectivity on endpoint docker_nginx_1 (e968dbfa7f6e8c8a549b5765462d1aaeee76e24e28cdef12df671ba8f9448012): Error starting userland proxy: Bind for 0.0.0.0:80: unexpected error (Failure EADDRINUSE)

ERROR: for nginx  Cannot start service nginx: driver failed programming external connectivity on endpoint docker_nginx_1 (e968dbfa7f6e8c8a549b5765462d1aaeee76e24e28cdef12df671ba8f9448012): Error starting userland proxy: Bind for 0.0.0.0:80: unexpected error (Failure EADDRINUSE)
```

Following commands below
```
# See all running services on port 80
sudo lsof -i :80

# Kill'em all
sudo killall httpd

# Unload'em
sudo launchctl unload /System/Library/LaunchDaemons/org.apache.httpd.plist
```