Feat: yaml config file

[sudo-Tiz]

I am currently on smartphone and i can't test the code (linked to #88 )

[sudo-Tiz]

Code have to be modified to set the default value if not defined neither in the config-file neither in cli args

[shizunge]

Thanks for the CL.

However we need more cleanup before checkin this: As now we have two ways to setup the config, and we may add env in the future, I would like to move the corresponding code to their own package.

In the mean time, you can help

• Updating the README. If you want, you can create a new file in a new docs folder.
• Adding examples how to use the config file.

We can have docs as specification, and examples as test input before implementing things.

[shizunge]

Current roadmap:

1. Create integration tests, including tests of the CLI arguments.
2. Update github actions
3. Read config file from yaml and/or ENV. traefik is doing it, we may borrow some codes there. (Note: traefik is under MIT license)
4. Build a new data processing pipeline, updating Prometheus metrics will be one stage of the pipeline.
5. enable-abuseipdb reporting, which will be a parallel stage of updating Prometheus metrics.

I will review this CL when we finish previous steps.

This CL is at step 3 above.