docker on mac

Required softwares:
* Vagrant
* docker-machine
* virtualbox

Create a file: `Vagrantfile`
```
Vagrant.configure("2") do |config|
  config.vm.box = "ubuntu/bionic64"
  config.vm.network "private_network", ip: "192.168.33.10"
  config.vm.provision "shell", inline: <<-SHELL
    apt-get update
  SHELL
end
```

in the terminal type: `vagrant up`. If there is an error. Dont do the mistake to type `vagrant up` again. Type `vagrant destroy` before

in the terminal create a the public key from `.vagrant/machines/default/virtualbox/private_key`. the command is: `ssh-keygen -y -f ~/.ssh/id_rsa > ~/.ssh/id_rsa.pub`

Now execute:
```
docker-machine create \
      --driver "generic" \
      --generic-ip-address 192.168.33.10 \
      --generic-ssh-user vagrant \
      --generic-ssh-key .vagrant/machines/default/virtualbox/private_key \
      --generic-ssh-port 22 \
      default
```

```
eval $(docker-machine env default)
sudo route -n add 172.17.0.0/16 $(docker-machine ip default)
```

Access the vagrant machine: `vagrant ssh`
Edit: `/etc/sysctl.conf`
```
net.ipv4.ip_forward = 1
```
In virtualbox, reboot the machine

from the terminal: `docker run -d httpd` and then `curl 172.17.0.2`