## TL;DR

cd docker && cp.env.example.env && docker compose up fails: the jawn/valhalla build context in docker-compose.yml doesn't match the repo's directory layout (missing shared directory context), plus unset MINIO env vars.

## Steps

1. Community workaround (koshyviv): in `./docker/docker-compose.yml` change the jawn build context to `..` with `dockerfile: valhalla/dockerfile`, and in `./valhalla/dockerfile` build with the parent directory as context (COPY ./valhalla/jawn/... and ./shared ... with the corrected paths). Maintainer chitalian confirmed and linked PR #3195 as the repo-side fix.

## When to use

Use this skill when you run into "Docker compose error".

## When not to use

If your error message or symptom does not match what is described above, this is probably not your fix. Search for your exact error text instead of forcing this one to fit.

## Versions

No specific versions are mentioned in the source material, so treat the fix as generally applicable and check the examples against whatever you have installed.

## Why this happens

The original report does not dig into a root cause. It documents the symptom and the fix that resolved it.