Variables Substitution

docker-compose supports Envrironment Variables Substitution like this:

    - FOO="${FOO}"

Dockhero CLI plugin changes the rules of variable resolution to the following:

  1. Your shell ENV has top priority, e.g. env FOO=bar heroku dh:compose up

  2. Your Heroku app's variables have the next priority, e.g. heroku config:set FOO=bar; heroku dh:compose up

  3. The variables from your .env file have the least priority

Setting a Heroku Environment variable is the recommended way to store your shared secrets and tokens in production

Besides the variables from your Heroku config, Dockhero CLI plugin makes the following enviroment variables available to the app:

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