Deploying to Fly

Fly applications are deployed with Docker images and they require an additional step to add the private hex repo.

Reference the secrets within in your Dockerfile by mounting it within a RUN command:

RUN --mount=type=secret,id=oban_auth_key \
    mix hex.repo add oban \
      --fetch-public-key SHA256:4/OSKi0NRF91QVVXlGAhb/BIMLnK8NHcx/EWs+aIWPc \
      --auth-key "$(cat /run/secrets/oban_auth_key)"

Then, if using the Fly CLI to deploy, pass the license through using the --build-secret flag:

fly deploy --build-secret oban_auth_key=OBAN_AUTH_KEY