elm-live returns nothing when running in a docker container

[dbj]

Setup

• elm-live 4.0.1
• Site image built from the node:13.12.0-buster-slim image
• Docker run maps host port 8000 to container port 8000
• Container runs and executes: elm-live ./src/Main.elm --dir=./static --pushstate -o -- --output=./static/assets/js/elmsite.js --debug

Reproduce

• Connect from the host : http://localhost:8000 and literally nothing is returned from the server

Expected Results

• Connect from the host : http://localhost:8000 and and the index.html file in the ./static directory is returned

Testing

• When I open a bash shell on the running container and connect to port 8000 using curl, the index.html file in the ./static directory is returned, so I know elm-live is configured and running properly

[dcellucci]

I found that adding --host=0.0.0.0 to the elm-live options (before the --) fixed this for me.

[asett0]

Correct me if my terminology is wrong. Docker assigns dynamic IP addresses to its containers. Because of this you need to specify --host=0.0.0.0. 0.0.0.0 is essentially an alias to listen on all IP addresses.

[dbj]

Of course. Thank you for pointing that out. :).