Add user to group

# Add user `some_user` to `docker` group
sudo usermod -aG docker some_user

Connect to hidden wireless network

edit /etc/wpa_supplicant/wpa_supplicant.conf with something like this:

ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1

# Important part below
network={
    scan_ssid=1
    ssid="NAME"
    psk="password"
}