Resolve "Cloudron app"

Closes #285 (closed)

TODO

• Add Cloudron install button to the readme.
• Add media files to the manifest.
• Set a secret key.

if [[ ! -f /app/data/.secret ]]; then
    echo "SECRET_ENV=$(some way to generate a secret)" > /app/data/.secret
fi

source /app/data/.secret

if [ ! -f /app/data/session.secret ]; then
  dd if=/dev/urandom bs=256 count=1 | base64 > /app/data/session.secret
fi

• Get feedback from the Cloudron community.