Temporary files for deploy should be hidden files

[70nyIT]

Describe the solution you'd like
Currently to deploy the Cloud Formation template, we copy the app.py file locally and run the deployment. We can do two improvements

• keep the app.py file as hidden, so .app.py
• call app.py in its location without copying, but passing all needed information as arguments (not sure if this second approach is possible)

I think a good improvement will be to avoid as much as possible copy and removing files in the folder of the website.

Remove the folder cdk.out at the end of the deployment. It's the folder generated by aws-cdk in which it saved the CloudFormation template generated.