Should next-runtime-env work with Docker and docker-compose?

[YerayAlonso]

I've tested the package and it works wonderfully in the examples you provide 🎉.
However, I fail to make it work with Docker and Docker Compose 🥀.

The idea would be to define the variables in a .env next to the docker.compose.yml, not next to the nextjs project. Then, pass the variables to the container at the startup.

I've prepared an example here.
I get undefined at the client side.
Note the __ENV.js file is present, but empty (window.__ENV = {}).

[YerayAlonso]

Solved using a Dockerfile without multistage.

[tom-searle]

Just to add for anyone that stumbles across this that I was also able to solve this issue by using a Dockerfile without multistage 👍