How to setup Node environment variable in Dockerfile for running node.js application?

docker containers kubernetes dockerfile docker-container

There a two ways, while building the image or when running the container.

For builds:

Add to your Dockerfile

ENV NODE_ENV=whatEver

Or use build arguments if you don't want them to stick during runtime Docker build --build-args NODE_ENV whatEver

When running:

Run your container with "-e"

docker run -e NODE_ENV=whatever mycontainer

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