chore: Use docker mirror for minio image (#58)

.github/workflows/test.yml

@@ -20,4 +20,6 @@ jobs:
           go-version-file: 'go.mod'
           cache: true
       - name: Run Tests
+        env:
+          DOCKER_MIRROR: docker.mirror.hashicorp.services
         run: go test -v ./...

scripts/minio_up.sh

@@ -82,7 +82,7 @@ docker run -dt --rm \
   -e "MINIO_CONSOLE_ADDRESS=:9090" \
   -e 'MINIO_VOLUMES=/mnt/data' \
   --name "$container_name" \
-  minio/minio server
+  "${DOCKER_MIRROR:+$DOCKER_MIRROR/}minio/minio" server
 echo -e 'Done!'
 
 echo 'Waiting for MinIO instance to be healthy...'