Fix file permission for .env file

[andygrunwald]

See cachethq/cachet#1111 for details

[GrahamCampbell]

This breaks stuff for people running artisan commands though, surely?

[andygrunwald]

Why breaks this change something?
We do the same (recursive) in line 6. See https://github.com/cachethq/Docker/blob/master/Dockerfile#L6

I tested with with this commands and it works great on my machine (Mac OS X El Capitan, Docker 1.9)

export DB_USERNAME=cachet
export DB_PASSWORD=cachet
export DB_ROOT_PASSWORD=cachet
export DB_DATABASE=cachet

docker build -t cachethq/docker:2.0.0-RC2 .

docker run --name mysql -e MYSQL_USER=$DB_USERNAME -e MYSQL_PASSWORD=$DB_PASSWORD  -e MYSQL_ROOT_PASSWORD=$DB_ROOT_PASSWORD -e MYSQL_DATABASE=$DB_DATABASE -d mysql

docker run -d --name cachet --link mysql:mysql -p 80:8000 -e DB_HOST=mysql -e DB_DATABASE=$DB_DATABASE -e DB_USERNAME=$DB_USERNAME -e DB_PASSWORD=$DB_PASSWORD cachethq/docker:2.0.0-RC2

docker exec -i cachet php artisan migrate --force
docker exec -it cachet php artisan key:generate
docker exec -it cachet php artisan config:cache

[jbrooksuk]

Ping @cachethq/docker