docs: Add initial example for Azure Container Apps.

[TomBeckett]

Description

Added a quick example for how to deploy Tapir to Container Apps on Azure.

Hopefully closes https://github.com/PacoVK/tapir/issues/47 .

Feel free to remove the README.md if you feel it is not necessary.

Type of change

Please delete options that are not relevant.

• [ ] New feature (non-breaking change which adds functionality)