This is a little thing that tripped me up, and I'd like to write this blog post so that I don't forget it!
Using AWS CodeStar is really awesome, and I highly recommend it. However, you need to be careful to modify your initial template.yml file appropriately or you'll have random HelloWorlds popping up all over the place. This blog post is about how to modify the template.
Once upon a time I was the serverless guy at a startup company building lambda functions. My function went into production at 128mb of memory and a timeout of 3 seconds. Because of game had "live races" we would see big spikes in traffic at certain times of the day, and unfortunately I would also see big spikes in the number of errors in the CloudWatch metrics charts... My boss even opened the website during the high volume event and noticed requests to the lambda returning 400 error. In the cloudwatch logs I could norrow down the logs to just the high volume time and see many timeout errors happening during this period. Needless to say, this is not a good look, and you don't want it to happen to you (especially you, future Jim)!
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