Add an environment variable to your container section should say about naming conventions for ballerina config

[rdulmina]

https://wso2.com/devant/docs/devops-and-ci-cd/manage-configurations-and-secrets/#add-an-environment-variable-to-your-container

In the above section, we should provide a sample Ballerina config convention and point to https://ballerina.io/learn/provide-values-to-configurable-variables/ for more details

BAL_CONFIG_VAR_key=value