Next run -p ____ would cause MODULE NOT FOUND issue, I am not sure why

Usually that's dependencies issue but I cannot confirm it.

Though my docker image already installs all required dependacies.

IF any of you cannot resolve this issue, you can just answer my original question (or give any workaround)

you can do it with the PORT environment variable

PORT=4000 npm start

Depending on the enviroment (windows and linux)

1. PORT not found on window terminal
2. The command executed but it seems that NextJS ignored the port (and went with default 3000) on Ubuntu terminal

really? cuz i used it just now and it works just fine

i don't know about windows, but linux should be fine. your docker image should be a linux distro

yeah this works for me too, (i'm on linux tho)

you can also define the port in the package.json with the --port flag

Interesting, I added some enviroment variables in enviroment in a docker compose file which resolves the issue (since it handles multiple containers and it allow me to define an unique port for each one)

This wouldn't work if I wanted to have more than one docker container running (they cannot share same port)

ahh i see

Could it have been another package manager (pnpm)?

Oh and if I were to run a command inside docker container, it would cause /app/PORT=4000 NOT FOUND (which doesn't make sense)

I wonder if there are other solutions than my current solution?

maybe better?

It looks like this is the best solution I got right now that supports multiple-containers.

No. Using --port or the PORT env var both work to configure the port that the nextjs server listens on. If it doesn’t work for you, it’s because your docker configuration is buggy.

Really? Honestly I've never seen it before.

Really?

Yes.

if I remember correctly, I don't think you can't inject environment variables in windows using the PORT=<number> pnpm start syntax unless you are using the cross-env package, but I could be wrong.

Yeah on windows env vars work differently

can't you just change the bind port on docker?