Docker builds are failing #1105
Description
Describe the bug
Starting with 2b592fe, Docker builds are now failing:
https://github.com/MobilityData/gtfs-validator/runs/5134131114?check_suite_focus=true
...with:
#10 [auth] mobilitydata/gtfs-validator:pull,push token for ghcr.io
#10 DONE 0.0s
#11 [auth] mobilitydata/gtfs-validator:pull,push token for ghcr.io
#11 DONE 0.0s
#8 exporting to image
#8 pushing layers 0.3s done
#8 ERROR: unexpected status: 403 Forbidden
------
> exporting to image:
------
error: failed to solve: unexpected status: 403 Forbidden
Error: buildx failed with: error: failed to solve: unexpected status: 403 Forbidden
How we reproduce the bug
Steps to reproduce the behaviour:
Expected behaviour
Docker build should succeed and be published.
Observed behaviour
Docker build failed (see above)