QOL - improvement

[stubacca]

Is your feature request related to a problem? Please describe.
The current quickstart template does not inform customers should enter a bucket with lower case characters.

Describe the solution you'd like
In the Quick-start template - s3 website bucket description should indicate that the bucket name should be lower case characters per s3 requirements.

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context
Add any other context or screenshots about the feature request here.