crowdprobe/wifi-ap repository overview

(amd64)ubuntu@localhost:~$ docker run --privileged -v /dev/urandom:/dev/random -ti --rm --name wifi-ap --net host crowdprobe/wifi-ap 
net.ipv4.ip_forward = 1
RTNETLINK answers: File exists
Failed to bring up wlan0.
 * Starting DNS forwarder and DHCP server dnsmasq                                                                                                                                                       [ OK ] 

Here are your Docker WiFi credentials:
ssid=dofi16475
wpa_passphrase=351842582389639037845504

Configuration file: /etc/hostapd/hostapd.conf
Using interface wlan0 with hwaddr 00:__:__:__:__:de and ssid "dofi16475"
wlan0: interface state UNINITIALIZED->ENABLED
wlan0: AP-ENABLED 

(amd64)ubuntu@localhost:~$ docker run --privileged -v /dev/urandom:/dev/random -d --name wifi-ap --net host crowdprobe/wifi-ap
a8___________________________________________________15
(amd64)ubuntu@localhost:~$ docker exec wifi-ap egrep '(^ssid|pass)' /etc/hostapd/hostapd.conf
ssid=dofi8061
wpa_passphrase=504057346146580446576640
(amd64)ubuntu@localhost:~$