To make a local Python virtual env and install dependencies specified in requirements.txt:
$ make activate
$ make install
Then run make test
Custom parameters defined in your CloudFormation template can have overrides specified in template_params.txt.
Before deployment your Lambda code is uploaded to your deployment bucket using the AWS CLI package command.
$ make clean # if previously built
$ make build # after code changes
$ make package # after code or CloudFormation changes
$ make deploy