Add more environment variables for Ankaios components

[inf17101]

Description

For the Ankaios CLI there is an environment variable for setting the server url: Issue #75. But we need more environment variables in the Ankaios CLI and also in the other Ankaios components, like Ankaios server, Ankaios agent to increase usability.

Goals

Having environment variables support for Ankaios server, Ankaios agent and enhance env support for Ankaios CLI.

This can be done after the issue in clap is fixed, because otherwise when an invalid value is set the error context remains to the cli argument not the env variable. https://github.com/clap-rs/clap/issues/5202

Final result

Summary

To be filled when the final solution is sketched.

Tasks

• [ ] Task 1
• [ ] Task 2
• [ ] ...

[windsource]

While working on #308 I was missing the following environment variables:

Server:

• ANKSERVER_STARTUP_CONFIG
• ANKSERVER_ADDRESS

Agent:

• ANKAGENT_NAME
• ANKAGENT_SERVER_URL