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d27da5ee3d
~~This is an attempt to fix the CI bug
[here](https://github.com/firezone/firezone/actions/runs/5491388141/jobs/10007864417#step:4:1638)
possibly introduced in
[d9eb2d18](https://github.com/firezone/firezone/commit/d9eb2d18#diff-88bd94db0d5cfd5f0617b7c4ed48c0212597378ed7e28714c5d86c95999b4c7dR29)
and uncovered / exacerbated in Elixir 1.15~~
Edit: looks like this ended up being a couple cache issues with GitHub
actions:
1. The `elixir_api-container-build` cache would always overwrite the
`elixir_web-container-build` on subsequent builds of the same
`github.ref_name` (cache is scoped to branch name by default), leading
to the consistent error `Elixir.Web.Mailer.NoopAdapter does not exist`
whenever a branch was pushed to more than once.
2. The same thing happens with the `integration_test-basic-flow` job
because the `api` service gets built after the `web` service in
docker-compose.yml, overwriting its cache
For some reason it seems the `APPLICATION_NAME` ARG is not busting the
Docker cache properly on GitHub actions for elixir container builds, so
the fix here was to [use
`scope=`](https://docs.docker.com/build/cache/backends/gha/#scope) to
segregate the cache layers between builds of the same branch.