Initial bootstrap

we want to implement some kind of bootstrapping feature which allows devs to easily get-started with AppFlow. The idea is that:

- Someone, ore some cloud, provides a blank VM with just `ssh`.
- An `appflow` (or other) user with an `ssh-password` must be provided on the VM.
- This user must have `sudo` rights.

so we run something like `utils/bootstrap.sh [] ` and this script will:

- Change the pwd of the `appflow` user or create it if it does not exist.
- Use the `mrrobot` config skeleton and configure `inventory` for new `appflow-tenant`
- Start provisioning basic AppFlow with example vhost.

we could also directly provide a public key or similar. In other words we want to just run a command with three parameters and everything get's setup on order to be ready to use AppFlow and deploy applications on a remote blank VM.