nvm in Docker and CI/CD

Configure nvm for containerized and CI/CD environments where shells run non-interactively.

Workflow

1. Install nvm in a Dockerfile:

   ENV NVM_DIR=/usr/local/nvm
   ENV NODE_VERSION=20.11.0
   RUN mkdir -p $NVM_DIR \
     && curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.40.1/install.sh | bash \
     && . $NVM_DIR/nvm.sh \
     && nvm install $NODE_VERSION \
     && nvm alias default $NODE_VERSION
   
   # Make nvm available in non-interactive shells
   ENV BASH_ENV="$NVM_DIR/nvm.sh"