Use Conjur CLI v8

[szh]

Desired Outcome

Use newly released Golang CLI for Conjur.

Implemented Changes

• Updates docker-compose.yml file to point to CLI version 8
• Updates CLI command syntax
• Use https proxy, allowing self-signed certs
• Fix test_workflow script bug in Units 3-4
• Use password with Postgres. Fixes #20
• Add CODEOWNERS file so the @cyberark/community-and-integrations-team will be notified of issues

Connected Issue/Story

CyberArk internal issue ID: ONYX-29538

[szh]

Waiting to merge this until the conjur.org docs are updated.

[szh]

Still waiting on website updates to conjur.org

[cancastilho]

I'm not sure if the problem I had is related to this issue, but I'll report here.

The current Quick Start Tutorial already has some commands that won't work with the current conjur-quickstart git repository. I've found that the problem is ocurring because the docker-client-cli is still in version 5 in docker-compose.yml. Changing it to version 8 will make things work properly. Here are some of the commands in the tutorial that had generated errors for me:

• docker-compose exec client conjur init -u https://proxy -a myConjurAccount --self-signed
• docker-compose exec client conjur login -i admin

It seems to me that it is time to update docker-compose.yml in the 'main' branch.

[szh]

@cancastilho This should all be sorted out now that this PR is merged and conjur.org is updated.