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root@localhost:~# su -
root@localhost:~# git clone https://github.com/discourse/discourse_docker.git /var/discourse
Cloning into '/var/discourse'...
remote: Enumerating objects: 5025, done.
remote: Total 5025 (delta 0), reused 0 (delta 0), pack-reused 5025
Receiving objects: 100% (5025/5025), 1.10 MiB | 2.40 MiB/s, done.
Resolving deltas: 100% (3259/3259), done.
root@localhost:~# cd /var/discourse
root@localhost:/var/discourse# ./discourse-setup
Docker not installed. Enter to install from https://get.docker.com/ or Ctrl+C to exit
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 13857  100 13857    0     0   6805      0  0:00:02  0:00:02 --:--:--  6809
# Executing docker install script, commit: 3d8fe77c2c46c5b7571f94b42793905e5b3e42e4
+ sh -c apt-get update -qq >/dev/null
+ sh -c DEBIAN_FRONTEND=noninteractive apt-get install -y -qq apt-transport-https ca-certificates curl >/dev/null
+ sh -c curl -fsSL "https://download.docker.com/linux/ubuntu/gpg" | apt-key add -qq - >/dev/null
Warning: apt-key output should not be parsed (stdout is not a terminal)
+ sh -c echo "deb [arch=amd64] https://download.docker.com/linux/ubuntu bionic stable" > /etc/apt/sources.list.d/docker.list
+ sh -c apt-get update -qq >/dev/null
+ [ -n  ]
+ sh -c apt-get install -y -qq --no-install-recommends docker-ce >/dev/null
+ sh -c docker version
Client: Docker Engine - Community
 Version:           20.10.2
 API version:       1.41
 Go version:        go1.13.15
 Git commit:        2291f61
 Built:             Mon Dec 28 16:17:32 2020
 OS/Arch:           linux/amd64
 Context:           default
 Experimental:      true

Server: Docker Engine - Community
 Engine:
  Version:          20.10.2
  API version:      1.41 (minimum version 1.12)
  Go version:       go1.13.15
  Git commit:       8891c58
  Built:            Mon Dec 28 16:15:09 2020
  OS/Arch:          linux/amd64
  Experimental:     false
 containerd:
  Version:          1.4.3
  GitCommit:        269548fa27e0089a8b8278fc4fc781d7f65a939b
 runc:
  Version:          1.0.0-rc92
  GitCommit:        ff819c7e9184c13b7c2607fe6c30ae19403a7aff
 docker-init:
  Version:          0.19.0
  GitCommit:        de40ad0
If you would like to use Docker as a non-root user, you should now consider
adding your user to the "docker" group with something like:

  sudo usermod -aG docker your-user

Remember that you will have to log out and back in for this to take effect!

WARNING: Adding a user to the "docker" group will grant the ability to run
         containers which can be used to obtain root privileges on the
         docker host.
         Refer to https://docs.docker.com/engine/security/security/#docker-daemon-attack-surface
         for more information.
Port 80 appears to already be in use.

This will show you what command is using port 80
COMMAND  PID     USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
nginx    958     root    8u  IPv4  20899      0t0  TCP *:http (LISTEN)
nginx    958     root    9u  IPv6  20901      0t0  TCP *:http (LISTEN)
nginx   3368 www-data    8u  IPv4  20899      0t0  TCP *:http (LISTEN)
nginx   3368 www-data    9u  IPv6  20901      0t0  TCP *:http (LISTEN)

If you are trying to run Discourse simultaneously with another web
server like Apache or nginx, you will need to bind to a different port

See https://meta.discourse.org/t/17247

If you are reconfiguring an already-configured Discourse, use 

./launcher stop app

to stop Discourse before you reconfigure it and try again.`
root@localhost:/var/discourse# ./launcher stop app

WARNING: We are about to start downloading the Discourse base image
This process may take anywhere between a few minutes to an hour, depending on your network speed

Please be patient

2.0.20201221-2020: Pulling from discourse/base
6ec7b7d162b2: Pull complete 
488a5181297e: Extracting [========================>                          ]  384.9MB/775.2MB
^C
root@localhost:/var/discourse# ./launcher stop app

WARNING: We are about to start downloading the Discourse base image
This process may take anywhere between a few minutes to an hour, depending on your network speed

Please be patient

2.0.20201221-2020: Pulling from discourse/base
6ec7b7d162b2: Pull complete 
488a5181297e: Pull complete 
Digest: sha256:e181dd9046cc293b10c5b29bbc21c5aa8b939ba5f0c500da4a9e952ed0b5195d
Status: Downloaded newer image for discourse/base:2.0.20201221-2020
docker.io/discourse/base:2.0.20201221-2020
Config file was not found, ensure containers/app.yml exists

ls: cannot access '*.yml': No such file or directory
Available configs ( )