fix(examples): do not manually set env vars in deployment

[stoupance]

Hello,

This PR aims to fix one issue and apply one finOps best practices:

• Delete env vars DB_PORT and DB_HOST from deployment because they are both automatically set by the operator
• Add the privateIP: true to reduce network billing

I also feel the AuthProxyWorkload should apply to a label selector so it could match multiple deployments, instead of a single deployment name. I did not include this change in this PR as it is not relevant to how the CSP works :-)

  workloadSelector:
    kind: Deployment
    selector:
      matchLabels:
        cloud-proxy-sql: "true"

Regards,
Sebastien.

• Tests pass
• Appropriate changes to README are included in PR

[jackwotherspoon]

Thanks for this @stoupance 👏

I will let @hessjcg take a look at this 😄

[hessjcg]

Looks good. Thank you for making the examples more helpful!