My docker entrypoint example (Node)

entrypoint.sh

#!/bin/sh -e

# https://medium.com/swlh/five-use-cases-for-docker-entry-points-a5eb6661dac6

case $1 in

  server)
    if [ "$ENVIRONMENT" == "production" ]; then
      node /app/server.js
    else
      npx pm2-dev /app/server.js
    fi
  ;;

  test)
    yarn test:ci
  ;;

  *)
    exec "$@"
  ;;

esac

exit 0