Add troubleshooting section in README and improvements to training_example.py #456

Job	Run time
Collect workflow inputs	4s
Max TF pre-commit	2m 9s
Min TF pre-commit (./terraform/modules/codebuild)	5s
Min TF pre-commit (./terraform/modules/codepipeline)	6s
Min TF pre-commit (./terraform/modules/codedeploy)	4s
Min TF pre-commit (./terraform/ec2-examples/distributed-ml-training)	18s
Min TF pre-commit (./terraform/ec2-examples/core-infra)	5s
Min TF pre-commit (./terraform/ec2-examples/lb-service)	3s
Min TF pre-commit (./terraform/ec2-examples/backend-service)	7s
Min TF pre-commit (./terraform/fargate-examples/backstage)	5s
Min TF pre-commit (./terraform/fargate-examples/graviton)	3s
Min TF pre-commit (./terraform/fargate-examples/queue-processing)	7s
Min TF pre-commit (./terraform/fargate-examples/prometheus)	4s
Min TF pre-commit (./terraform/fargate-examples/vpc-endpoints)	6s
Min TF pre-commit (./terraform/fargate-examples/core-infra)	3s
Min TF pre-commit (./terraform/fargate-examples/lb-service)	7s
Min TF pre-commit (./terraform/fargate-examples/backend-service)	3s
Min TF pre-commit (./terraform/fargate-examples/sqs-dynamic-target-tracking)	7s
	3m 46s

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