Cannot deploy due to Docker error

I got the same error today, fresh Phoenix app following the Fly.io guide.

I looked up the default tag 1.13.4-erlang-25.0.4-debian-bullseye-20210902-slim on Docker Hub and saw that it didn’t exist. Updating my Dockerfile to point to 1.13.4-erlang-25.0.4-debian-bullseye-20220801-slim instead allowed me to fly deploy.

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