Atualização: do nada começou a funcionar, favor desconsiderar
Tentei criar o container conforme as instruções de aula:
felipenery@felipenery-virtual-machine:$ docker run -it -d -P dockersamples/static-site
ac6eb6662ef785667c20de0e1d5ff445713b9b05ce2278d4bbc63b7804cd08e4
felipenery@felipenery-virtual-machine:$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
ac6eb6662ef7 dockersamples/static-site "/bin/sh -c 'cd /usr…" 10 seconds ago Up 7 seconds 0.0.0.0:32778->80/tcp, :::32778->80/tcp, 0.0.0.0:32777->443/tcp, :::32777->443/tcp dazzling_goldstine
felipenery@felipenery-virtual-machine:~$ docker port ac6eb6662ef7
80/tcp -> 0.0.0.0:32778
80/tcp -> [::]:32778
443/tcp -> 0.0.0.0:32777
443/tcp -> [::]:32777
Porém ao tentar acessar no navegador http://localhost:32778 dá o erro:
This site can’t be reachedThe connection was reset. Try:
Checking the connection Checking the proxy and the firewall ERR_CONNECTION_RESET
PS: Outros sites abrem normalmente.