So Noda

*Issue #, if available:* N/A *Description of changes:* The `Events` block of the `CustomerAccountingService` resource is incorrectly indented. Therefore, I commented out the section and deployed the Lambda function, but...

```sh $ go version go version go1.15.3 linux/amd64 $ stty cols 0 $ ojichatrix panic: invalid argument to Intn goroutine 1 [running]: math/rand.(*Rand).Intn(0xc000094150, 0xffffffffffffffff, 0xc0000f1df8) /usr/lib/golang/src/math/rand/rand.go:169 +0x9d math/rand.Intn(...) /usr/lib/golang/src/math/rand/rand.go:337 main.main()...

*Issue #, if available:* *Description of changes:* - Added instructions to change `CognitoDomainPrefix` in `config/app-config-demo.json` to avoid conflicts with resources created by other users. - Corrected the instructions to run...