Sure, the delay was between steps 5 and 6.
Assuming this is related to some cdn latency, the github repo was created within +10/20 minutes the Automated Build was created on Docker Hub. Docker Hub was not retrieving the Dockerfile within the first hour and not greater then a 4/5 hour after the github repo was created.
Its difficult to be certain, but the process brokedown in step 6 as Docker Hub was not finding the Dockerfile and Readme.md.