How do I use dotenv in a Docker container?

How do I use dotenv in a Docker container?

To use dotenv in a Docker container, you need to ensure that your .env file is accessible to the container. You can do this by using a volume to mount the .env file into the container.

Can you show me an example of a Dockerfile that uses dotenv?

Sure! Here's a simple example:

FROM node:14
WORKDIR /app
COPY . .
RUN npm install
CMD ["node", "index.js"]

Make sure to mount your .env file when you run the container.

How do I run the container with the .env file?

You can run the container with the .env file using the following command:

docker run --env-file .env -v $(pwd):/app your-image-name

What if I want to use multiple .env files?

You can specify different .env files by using the --env-file option multiple times or by creating a custom entrypoint script that loads the desired .env file.