title: How to specify multiple "env_files" for a docker compose service?
body: <p>Currently I have setup my service like the following.</p>
  <pre><code>version: '3'
  services:
    gateway:
      container_name: gateway
      image: node:lts-alpine
      working_dir: /
      volumes:
        - ./package.json:/package.json
        - ./tsconfig.json:/tsconfig.json
        - ./services/gateway:/services/gateway
        - ./packages:/packages
        - ./node_modules:/node_modules
      env_file: .env
      command: yarn run ts-node-dev services/gateway --colors
      ports:
        - 3000:3000
  </code></pre>
  <p>So I have specified one <code>env_file</code>. But now I want to pass multiple .env files.</p>
  <p>Unfortunately, the following is not possible:</p>
  <pre><code>    env_files:
         - .env.secrets
         - .env.development
  </code></pre>
  <p>Is there any way to pass multiple .env files to one service in docker-compsoe?</p>