Connection refused after installation using docker run

[msawyer91]

I found it-tools through a Google search on this site: https://www.smarthomebeginner.com/best-docker-containers-for-home-server/

I have a Raspberry Pi on which I ran the following command (from the readme):
docker run -d --name it-tools --restart unless-stopped -p 8080:80 corentinth/it-tools:latest

When navigating to the Pi by hitting http://raspberry Google Chrome simply returns connection refused. I tried https as well, but received the same message. I changed the ports to a custom port (e.g. 21505) -- this required me to docker stop it-tools, docker rm it-tools, and re-deploy such as:
docker run -d --name it-tools --restart unless-stopped -p 21505:21505 corentinth/it-tools:latest

Then navigating to http://raspberry:21505 or https://raspberry:21505 still yields connection refused.

I have Portainer installed, so I can access the container logs quite easily. You'll notice exit and gracefully shutting down messages; this is because I had Portainer running with log refresh enabled, and I ran docker stop and docker run commands, as I wanted to see if errors were thrown. The container shut down and restarted without any observable errors.

Why am I not able to connect to this container regardless of which ports I publish it on? My Raspberry Pi is up-to-date (I ran sudo apt-get update and sudo apt-get upgrade, and rebooted after updating). Below are the logs for it-tools from Portainer.

/docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/
/docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh
10-listen-on-ipv6-by-default.sh: info: Getting the checksum of /etc/nginx/conf.d/default.conf
10-listen-on-ipv6-by-default.sh: info: /etc/nginx/conf.d/default.conf differs from the packaged version
/docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh
/docker-entrypoint.sh: Launching /docker-entrypoint.d/30-tune-worker-processes.sh
/docker-entrypoint.sh: Configuration complete; ready for start up
2023/07/14 02:20:58 [notice] 1#1: using the "epoll" event method
2023/07/14 02:20:58 [notice] 1#1: nginx/1.24.0
2023/07/14 02:20:58 [notice] 1#1: built by gcc 12.2.1 20220924 (Alpine 12.2.1_git20220924-r4)
2023/07/14 02:20:58 [notice] 1#1: OS: Linux 6.1.21-v8+
2023/07/14 02:20:58 [notice] 1#1: getrlimit(RLIMIT_NOFILE): 1048576:1048576
2023/07/14 02:20:58 [notice] 1#1: start worker processes
2023/07/14 02:20:58 [notice] 1#1: start worker process 29
2023/07/14 02:20:58 [notice] 1#1: start worker process 30
2023/07/14 02:20:58 [notice] 1#1: start worker process 31
2023/07/14 02:20:58 [notice] 1#1: start worker process 32
2023/07/14 02:27:20 [notice] 1#1: signal 3 (SIGQUIT) received, shutting down
2023/07/14 02:27:20 [notice] 30#30: gracefully shutting down
2023/07/14 02:27:20 [notice] 29#29: gracefully shutting down
2023/07/14 02:27:20 [notice] 31#31: gracefully shutting down
2023/07/14 02:27:20 [notice] 30#30: exiting
2023/07/14 02:27:20 [notice] 29#29: exiting
2023/07/14 02:27:20 [notice] 31#31: exiting
2023/07/14 02:27:20 [notice] 29#29: exit
2023/07/14 02:27:20 [notice] 31#31: exit
2023/07/14 02:27:20 [notice] 30#30: exit
2023/07/14 02:27:20 [notice] 32#32: gracefully shutting down
2023/07/14 02:27:20 [notice] 32#32: exiting
2023/07/14 02:27:20 [notice] 32#32: exit
2023/07/14 02:27:20 [notice] 1#1: signal 17 (SIGCHLD) received from 30
2023/07/14 02:27:20 [notice] 1#1: worker process 29 exited with code 0
2023/07/14 02:27:20 [notice] 1#1: worker process 30 exited with code 0
2023/07/14 02:27:20 [notice] 1#1: worker process 31 exited with code 0
2023/07/14 02:27:20 [notice] 1#1: signal 17 (SIGCHLD) received from 32
2023/07/14 02:27:20 [notice] 1#1: worker process 32 exited with code 0
2023/07/14 02:27:20 [notice] 1#1: exit
/docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration
/docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/
/docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh
10-listen-on-ipv6-by-default.sh: info: Getting the checksum of /etc/nginx/conf.d/default.conf
10-listen-on-ipv6-by-default.sh: info: /etc/nginx/conf.d/default.conf differs from the packaged version
/docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh
/docker-entrypoint.sh: Launching /docker-entrypoint.d/30-tune-worker-processes.sh
/docker-entrypoint.sh: Configuration complete; ready for start up
2023/07/14 02:27:21 [notice] 1#1: using the "epoll" event method
2023/07/14 02:27:21 [notice] 1#1: nginx/1.24.0
2023/07/14 02:27:21 [notice] 1#1: built by gcc 12.2.1 20220924 (Alpine 12.2.1_git20220924-r4)
2023/07/14 02:27:21 [notice] 1#1: OS: Linux 6.1.21-v8+
2023/07/14 02:27:21 [notice] 1#1: getrlimit(RLIMIT_NOFILE): 1048576:1048576
2023/07/14 02:27:21 [notice] 1#1: start worker processes
2023/07/14 02:27:21 [notice] 1#1: start worker process 29
2023/07/14 02:27:21 [notice] 1#1: start worker process 30
2023/07/14 02:27:21 [notice] 1#1: start worker process 31
2023/07/14 02:27:21 [notice] 1#1: start worker process 32

[msawyer91]

Disregard, I had the custom ports reversed. The "internal" port (the one after the colon) must always be 80. The external port can be anything you want from 1-65535.