Deployment command should use app.bicep instead of traderx.bicep

_Description:_
The deployment command currently uses traderx.bicep:

rad deploy traderx.bicep -w prod-azure
rad deploy traderx.bicep -w prod-aws
It should use app.bicep instead, since app.bicep exists and has been tested.

_Steps to Reproduce:_
Run the deployment command as documented. The deployment will faill

_Expected:_
The command should use app.bicep, e.g.:

rad deploy app.bicep -w prod-azure
rad deploy app.bicep -w prod-aws

Search the repository for the documented `rad deploy traderx.bicep` commands and the `traderx.bicep` reference. Update those deployment examples to use `app.bicep`, then verify that the documented prod-azure and prod-aws commands match the expected invocation.

Written by the indexing model from the issue text.