mookjp/pool — pull request #67 by ainoya (2014-11-21 20:06:16+00:00)
Title: Set environment variable to preview container `POOL_HOSTNAME`

#65 .
Workaround:
```
vagrant up
open http://master.pool.dev
vagrant ssh
sudo /app/vendor/scripts/docker-enter
# show environment variables in the preview container
printenv #=>POOL_HOSTNAME="master.pool.dev"
```