Best workflow to test if serverless docker containers work?

Currently, this is my workflow -> make a code change locally in Dockerfile -> cloud build happens (30mins) -> docker pushed to dockerhub -> I restart runpod serverless workers manually -> I send a request using the test page -> runpod downloads the docker (10 mins) -> model actually runs (10mins)

Thus, it takes 1hr for me to test any change I make on serverless docker containers. What is a good way to build dockers or test changes more quickly?