timeout on first install

[r3k2]

Hello I am following this official setup https://docs.rocket.chat/installing-and-updating/docker-containers
everything seems ok until I try to go to the url and create an admin account, it will just hang forever and on the nginx logs it says it timedout...

 tail -f rocketchat_error.log 
2021/07/19 16:55:58 [error] 7329#7329: *1 upstream timed out (110: Connection timed out) while reading response header from upstream, client: 213.xx.xx.xx, server: chat.xxxxxx.com, request: "POST /api/v1/method.callAnon/registerUser HTTP/1.1", upstream: "http://127.0.0.1:3000/api/v1/method.callAnon/registerUser", host: "chat.xxxxxx.com", referrer: "https://chat.xxxxxxx.com/setup-wizard/1"

docker ps

docker ps
CONTAINER ID   IMAGE                                                COMMAND                  CREATED         STATUS                          PORTS                                       NAMES
8682114feb1b   rocketchat/hubot-rocketchat:latest                   "/bin/sh -c 'node -e…"   7 minutes ago   Restarting (1) 57 seconds ago                                               opt_hubot_1
368c7ea41010   registry.rocket.chat/rocketchat/rocket.chat:latest   "docker-entrypoint.s…"   7 minutes ago   Up 7 minutes                    0.0.0.0:3000->3000/tcp, :::3000->3000/tcp   opt_rocketchat_1
91b31e9d5b63   mongo:4.0                                            "docker-entrypoint.s…"   7 minutes ago   Up 7 minutes                    27017/tcp                                   opt_mongo_1

on a netstat I do not see mongo port listening on 127.0.0.1 ..... could this be the issue?
I have not change anything only where I am supposed to add my domain on the docker compose yaml file.

[edit]

docker ps --format "{{.Ports}}"

0.0.0.0:3000->3000/tcp, :::3000->3000/tcp
27017/tcp

[edit 2]

rocketchat_1          | ➔ +----------------------------------------------------+
rocketchat_1          | Error: Connection timeout
rocketchat_1          |     at SMTPConnection._formatError (/app/bundle/programs/server/npm/node_modules/meteor/email/node_modules/nodemailer/lib/smtp-connection/index.js:784:19)
rocketchat_1          |     at SMTPConnection._onError (/app/bundle/programs/server/npm/node_modules/meteor/email/node_modules/nodemailer/lib/smtp-connection/index.js:770:20)
rocketchat_1          |     at Timeout.<anonymous> (/app/bundle/programs/server/npm/node_modules/meteor/email/node_modules/nodemailer/lib/smtp-connection/index.js:235:22)
rocketchat_1          |     at listOnTimeout (internal/timers.js:554:17)
rocketchat_1          |     at processTimers (internal/timers.js:497:7) {
rocketchat_1          |   code: 'ETIMEDOUT',
rocketchat_1          |   command: 'CONN'
rocketchat_1          | }

[sampaiodiego]

are you on an air gapped environment? have you set MAIL_URL env var to run rocket.chat container?

[iQiexie]

same for me